{"title":"700C 28mm","description":"\u003cp data-mce-fragment=\"1\"\u003e700C size carbon rim,most for disc brake rim brake optional,apply for road,grave,time trial etc \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e28mm outer wide,21mm inner wide  is compatible tire size from 25C to 43C\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eToray T700 with stable resin,complete hand made product,100% quality check by auto machine for the stable quality.More models and weave option etc for your OEM projects\u003c\/p\u003e","products":[{"product_id":"700c-carbon-road-rim-40mm-deep-28mm-wide-tubeless-hooked-hookless","title":"700c Carbon Road Rim 40mm Deep | 28mm Wide Tubeless (Hooked\/Hookless)","description":"\u003ch2\u003e700c Carbon Road Rim, 40mm Depth, 28mm Outer, 21mm Inner – Tubeless, Hooked or Hookless\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e \u003cbr\u003eThis 700c carbon road rim features a 40mm aerodynamic depth, 28mm external width, and 21mm internal width, supporting both hooked and hookless tubeless tire setups. Choose from standard (425g), superlight (390g), or ultralight (365g) construction for your ideal strength-to-weight balance. Designed for modern endurance and race applications, this U-shape profile rim optimizes rolling resistance, compliance, and high-speed stability for 28–32mm wide road tires.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eKey Specifications\u003c\/strong\u003e:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRim Size: 700c (ISO 622mm)\u003c\/li\u003e\n\u003cli\u003eRim Depth: 40mm\u003c\/li\u003e\n\u003cli\u003eExternal Width: 28mm\u003c\/li\u003e\n\u003cli\u003eInternal Width: 21mm\u003c\/li\u003e\n\u003cli\u003eProfile: U-shape, aerodynamic\u003c\/li\u003e\n\u003cli\u003eTypical Weights: Standard (425g ± 15g), Superlight (390g ± 10g), Ultralight (365g ± 10g)\u003c\/li\u003e\n\u003cli\u003eE.R.D.: 559mm\u003c\/li\u003e\n\u003cli\u003eMaximum Rider Weight: 120kg\u003c\/li\u003e\n\u003cli\u003eCompressive Strength: \u0026gt;300kg\u003c\/li\u003e\n\u003cli\u003eDisc Brake Compatible\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eComparison Table – Weight Options\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eTier\u003c\/th\u003e\n\u003cth\u003eApprox. Weight\u003c\/th\u003e\n\u003cth\u003eUse Case\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003e425g\u003c\/td\u003e\n\u003ctd\u003eAll-round racing, durability focus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuperlight\u003c\/td\u003e\n\u003ctd\u003e390g\u003c\/td\u003e\n\u003ctd\u003eClimbing, reduced mass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUltralight\u003c\/td\u003e\n\u003ctd\u003e365g\u003c\/td\u003e\n\u003ctd\u003eMaximum weight savings for competitive racing (trade-off: lower impact tolerance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCertifications, Testing \u0026amp; Materials\u003c\/h3\u003e\u003cp\u003eConstructed using high-tensile carbon fiber, subjected to industry-standard ISO impact and compressive testing for safety and longevity. Meets EN 14781 safety requirements for racing rims. \u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Is a 28mm wide, 40mm deep carbon rim suitable for endurance cycling?\u003c\/strong\u003e\u003cbr\u003eA: Yes. The 28mm external width and 21mm internal width pair optimally with 28–32mm tires for reduced rolling resistance, improved grip, and better comfort for endurance and mixed-condition racing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the benefit of tubeless hookless versus hooked setup?\u003c\/strong\u003e\u003cbr\u003eA: Hookless rims offer slightly lower weight and easier manufacturing compliance with tubeless tires, but require compatible tubeless tire models (per ETRTO 2023, max 5 bar \/ 72 psi for hookless). Hooked rims accept a wider range of tire brands and pressures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Are these rims compatible with disc brakes?\u003c\/strong\u003e\u003cbr\u003eA: Yes. Designed for modern disc brake systems with reinforced spoke beds for reliable performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What tires are recommended for a 21mm inner width rim?\u003c\/strong\u003e\u003cbr\u003eA: 28mm–32mm wide road tubeless tires provide optimal aerodynamic and ride quality performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eRelevant Standards\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMaterial: High-modulus carbon fiber (ISO\/EN tested)\u003c\/li\u003e\n\u003cli\u003eRider Weight Limit: 120kg\u003c\/li\u003e\n\u003cli\u003eTubeless Standards: ETRTO 2023\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"700c Carbon Road Rim 40mm – 28mm Wide, 21mm Inner, Tubeless Hook or Hookless\",\n  \"description\": \"700c Carbon Road Rim, 40mm Depth, 28mm Outer, 21mm Inner – Tubeless, Hooked or Hookless Overview: This 700c carbon road rim features a 40mm aerodynamic depth, 28mm external width, and 21mm internal width, supporting both hooked and hookless tubeless tire setups. Choose from standard (425g), superlight (390g), or ultralight (365g) construction for your ideal strength-to-weight balance. Designed for modern endurance and race applications, this U-shape profile rim optimizes rolling resistance, compliance, and high-speed stability for 28–32mm wide road tires. Key Specifications : Rim Size: 700c (ISO 622mm) Rim Depth: 40mm External Width: 28mm Internal Width: 21mm Profile: U-shape, aerodynamic Typical Weights: Standard (425g ± 15g), Superlight (390g ± 10g), Ultralight (365g ± 10g) E.R.D.: 559mm Maximum Rider Weight: 120kg Compressive Strength: \u0026gt;300kg Disc Brake Compatible Comparison Table – Weight Options Tier Approx. Weight Use Case Standard 425g All-round racing, durability focus Superlight 390g Climbing, reduced mass Ultralight 365g Maximum weight savings for competitive racing (trade-off: lower impact tolerance) Certifications, Testing \u0026 Materials Constructed using high-tensile carbon fiber, subjected to industry-standard ISO impact and compressive testing for safety and longevity. Meets EN 14781 safety requirements for racing rims. Frequently Asked Questions Q: Is a 28mm wide, 40mm deep carbon rim suitable for endurance cycling? A: Yes. The 28mm external width and 21mm internal width pair optimally with 28–32mm tires for reduced rolling resistance, improved grip, and better comfort for endurance and mixed-condition racing. Q: What is the benefit of tubeless hookless versus hooked setup? A: Hookless rims offer slightly lower weight and easier manufacturing compliance with tubeless tires, but require compatible tubeless tire models (per ETRTO 2023, max 5 bar \/ 72 psi for hookless). Hooked rims accept a wider range of tire brands and pressures. Q: Are these rims compatible with disc brakes? A: Yes. Designed for modern disc brake systems with reinforced spoke beds for reliable performance. Q: What tires are recommended for a 21mm inner width rim? A: 28mm–32mm wide road tubeless tires provide optimal aerodynamic and ride quality performance. 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The 30mm deep U-shape profile and 28mm outer width support improved tire interface and stability, while the asymmetric drilling corrects spoke tension differences common in cassette-side dished wheels. Each rim is crafted from premium unidirectional carbon fiber in a matte black finish, resulting in a verified rim weight of 285 ±10g (standard build: 305 ±15g).\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Standard\u003c\/td\u003e\n\u003ctd\u003e700C (ISO 622mm BSD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Type\u003c\/td\u003e\n\u003ctd\u003eTubular, U-shape\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAsymmetry\u003c\/td\u003e\n\u003ctd\u003eFront 7°, Rear 5° \u0026amp; 7° spoke offset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Depth\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width\u003c\/td\u003e\n\u003ctd\u003e28mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEffective Rim Diameter (ERD)\u003c\/td\u003e\n\u003ctd\u003e578mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e285 ±10g (superlight) \/ 305 ±15g (standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Tension Max\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;280kgf\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Tire Pressure\u003c\/td\u003e\n\u003ctd\u003e125psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRider Weight Limit\u003c\/td\u003e\n\u003ctd\u003e100kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003ePerformance \u0026amp; Use Cases\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOptimized for road racing, climbing, and endurance rides—ideal for high-performance wheel builds\u003c\/li\u003e\n\u003cli\u003eAsymmetric drilling balances spoke tension for increased long-term durability, especially in modern cassette-equipped rear wheels\u003c\/li\u003e\n\u003cli\u003eSuperlight construction reduces rotational mass, aiding in quick acceleration and responsive climbing\u003c\/li\u003e\n\u003cli\u003eFits 23–28C tubular tires. See size guide for compatibility with common tire models.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQs\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: Is a 30mm deep carbon rim versatile for both climbing and flat sections?\u003c\/strong\u003e\u003cbr\u003eA: Yes. A 30mm depth strikes an aerodynamic and weight balance, making it suitable for varied race profiles—climbs and fast flats.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Why choose asymmetric over symmetric carbon rims?\u003c\/strong\u003e\u003cbr\u003eA: Asymmetric designs help equalize left-right spoke tension, minimizing stress and extending wheel life—especially in rear wheels with cassette offset.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What is the typical weight for a superlight tubular carbon road rim?\u003c\/strong\u003e\u003cbr\u003eA: Industry norms range 280–350g for high-end tubular road rims. Bola’s verified 285g is among the lightest documented for 700C\/30mm depth options.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Tubular vs. clincher carbon rims—which for road racing?\u003c\/strong\u003e\u003cbr\u003eA: Tubular carbon rims remain preferred for elite racing due to lower weight and better ride feel, though clinchers provide convenience. Bola’s tubular is aimed at performance-focused use.\u003c\/p\u003e\u003ch3\u003eCompliance \u0026amp; Quality\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManufactured to ISO 4210-7 standards for bicycle safety\u003c\/li\u003e\n\u003cli\u003e100% QC tested—layup, impact, and tension verification\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003e10+ years serving cycling brands and teams across Europe and North America.\u003c\/em\u003e\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Bola 700C Asymmetric Tubular Carbon Road Rim – 30mm Deep, 28mm Wide, 285g Superlight\",\n  \"description\": \"Bola 700C Asymmetric Tubular Carbon Road Rim Overview Designed for professional teams, custom builders, and competitive cyclists, the Bola 700C asymmetric tubular carbon road rim offers a blend of aerodynamic efficiency, weight savings, and balanced spoke tension. The 30mm deep U-shape profile and 28mm outer width support improved tire interface and stability, while the asymmetric drilling corrects spoke tension differences common in cassette-side dished wheels. Each rim is crafted from premium unidirectional carbon fiber in a matte black finish, resulting in a verified rim weight of 285 ±10g (standard build: 305 ±15g). Key Specifications Parameter Value Rim Standard 700C (ISO 622mm BSD) Rim Type Tubular, U-shape Asymmetry Front 7°, Rear 5° \u0026amp; 7° spoke offset Rim Depth 30mm Outer Width 28mm Effective Rim Diameter (ERD) 578mm Weight 285 ±10g (superlight) \/ 305 ±15g (standard) Spoke Tension Max \u0026gt;280kgf Max Tire Pressure 125psi Rider Weight Limit 100kg Performance \u0026amp; Use Cases Optimized for road racing, climbing, and endurance rides—ideal for high-performance wheel builds Asymmetric drilling balances spoke tension for increased long-term durability, especially in modern cassette-equipped rear wheels Superlight construction reduces rotational mass, aiding in quick acceleration and responsive climbing Fits 23–28C tubular tires. See size guide for compatibility with common tire models. FAQs Q: Is a 30mm deep carbon rim versatile for both climbing and flat sections? A: Yes. A 30mm depth strikes an aerodynamic and weight balance, making it suitable for varied race profiles—climbs and fast flats. Q: Why choose asymmetric over symmetric carbon rims? A: Asymmetric designs help equalize left-right spoke tension, minimizing stress and extending wheel life—especially in rear wheels with cassette offset. Q: What is the typical weight for a superlight tubular carbon road rim? A: Industry norms range 280–350g for high-end tubular road rims. Bola’s verified 285g is among the lightest documented for 700C\/30mm depth options. Q: Tubular vs. clincher carbon rims—which for road racing? A: Tubular carbon rims remain preferred for elite racing due to lower weight and better ride feel, though clinchers provide convenience. Bola’s tubular is aimed at performance-focused use. 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Tested to resist \u0026gt;300kg frontal load, per ISO standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs the 350g ultralight rim reliable for daily use?\u003c\/strong\u003e\u003cbr\u003eYes. All weight classes meet the same compressive and torsional strength standards. The 350g rim is ideal for competition and light riders, while the 430g rim offers extra durability for heavier use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40mm vs 45mm: which is better for climbing?\u003c\/strong\u003e\u003cbr\u003eThe 40mm rim is lighter, ideal for climbing and fast accelerations. The 45mm rim offers marginally better aerodynamic performance for flat or rolling terrain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhy choose a 22mm internal width?\u003c\/strong\u003e\u003cbr\u003eThis improves tire stability, allows for lower tire pressures, and offers better grip and comfort for 25–32mm modern road tires.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShould I choose superlight or ultralight for road racing?\u003c\/strong\u003e\u003cbr\u003eIf maximizing climbing speed is the priority and your total system weight is low, ultralight (370g) is optimal. 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fiber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e 55mm or 60mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 28mm outer, 22mm inner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e Wavy U-shape, optimized for aerodynamics and crosswind stability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Four grades (Standard 515g, Superlight 475g, Ultralight 450g, Extreme Light 415g), +\/- tolerance per tier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpoke Tension:\u003c\/strong\u003e Up to 300kg; recommended assembly \u0026gt;280kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRider Weight Limit:\u003c\/strong\u003e 120kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTire Compatibility:\u003c\/strong\u003e Clincher and tubeless-ready\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePerformance Comparison 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Each rim passes ISO 4210 and SCA fatigue\/durability standards up to 120kg rider limit. 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Superlight at 415g (±15g); also available as 435g (±15g) standard build. Supports up to 120kg rider weight at 100–125 psi. Ideal for flat and rolling courses where aero efficiency is prioritized, though deeper profile may catch more crosswind on technical climbs.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Standard\u003c\/td\u003e\n\u003ctd\u003e700C (ISO 622)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eU-shape, 60mm depth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width\u003c\/td\u003e\n\u003ctd\u003e28mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEffective Rim Diameter (ERD)\u003c\/td\u003e\n\u003ctd\u003e518mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight – Standard\u003c\/td\u003e\n\u003ctd\u003e435 ± 15g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight – Superlight\u003c\/td\u003e\n\u003ctd\u003e415 ± 15g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTire Compatibility\u003c\/td\u003e\n\u003ctd\u003eTubular only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRider Weight Limit\u003c\/td\u003e\n\u003ctd\u003e120kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMin \/ Max Tire Pressure\u003c\/td\u003e\n\u003ctd\u003e100–125 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForward Compressive Strength\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;300kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLateral Torsion\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;50kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Hole Tension\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;280kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eReal-World Use Case\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoad Racing \/ Triathlon\u003c\/strong\u003e: 60mm depth offers aerodynamic gains for flat and sprint courses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEndurance \/ Urban\u003c\/strong\u003e: Lightweight rim supports high performance while maintaining durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClimbing and Crosswinds\u003c\/strong\u003e: Deeper profile may be more sensitive to gusts; lighter option aids on moderate climbs but not for extreme gradients.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eComparison Table\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003e700C\/28mm\/60mm (this rim)\u003c\/th\u003e\n\u003cth\u003e25mm\/60mm (common)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e28mm\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e415–435g\u003c\/td\u003e\n\u003ctd\u003e425–440g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTire Fit\u003c\/td\u003e\n\u003ctd\u003e28mm tubular\u003c\/td\u003e\n\u003ctd\u003e25mm tubular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eFAQs\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Is a 60mm deep carbon rim suitable for triathlons?\u003c\/strong\u003e\u003cbr\u003eA: Yes, this rim is optimized for sustained speed and lower drag on flat\/rolling courses typical in triathlon events.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: How does 28mm width impact performance compared to 25mm?\u003c\/strong\u003e\u003cbr\u003eA: 28mm width increases tire support for stability and cornering, matching modern racing trends.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the typical weight for a quality tubular carbon rim?\u003c\/strong\u003e\u003cbr\u003eA: Lightweight options are 400–440g; this rim (415–435g) meets high-performance standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Are 60mm deep rims too affected by crosswinds?\u003c\/strong\u003e\u003cbr\u003eA: Deep-section rims offer speed but will catch more wind; suitable for riders comfortable managing gusts.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCertifications \u0026amp; Standards\u003c\/h3\u003e\u003cp\u003eThis rim is manufactured to ISO 4210-7 and undergoes compressive and fatigue strength testing. 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Key Specifications Parameter Value Rim Standard 700C (ISO 622) Profile U-shape, 60mm depth Outer Width 28mm Effective Rim Diameter (ERD) 518mm Weight – Standard 435 ± 15g Weight – Superlight 415 ± 15g Tire Compatibility Tubular only Rider Weight Limit 120kg Min \/ Max Tire Pressure 100–125 psi Forward Compressive Strength \u0026gt;300kg Lateral Torsion \u0026gt;50kg Spoke Hole Tension \u0026gt;280kg Real-World Use Case Road Racing \/ Triathlon : 60mm depth offers aerodynamic gains for flat and sprint courses. Endurance \/ Urban : Lightweight rim supports high performance while maintaining durability. Climbing and Crosswinds : Deeper profile may be more sensitive to gusts; lighter option aids on moderate climbs but not for extreme gradients. Comparison Table Feature 700C\/28mm\/60mm (this rim) 25mm\/60mm (common) Width 28mm 25mm Weight 415–435g 425–440g Tire Fit 28mm tubular 25mm tubular FAQs Q: Is a 60mm deep carbon rim suitable for triathlons? 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Bola's 700C carbon road rim features a 30mm aerodynamic profile, 28mm outer width, and four weight classes (315–400g) to match diverse cycling disciplines. Tubeless ready and constructed from Toray T700\/T800 carbon, it's engineered for efficient climbing, endurance racing, and premium road performance.\u003c\/p\u003e \u003ch3\u003eKey Specifications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eRim Dimensions:\u003c\/strong\u003e 700C size, 30mm depth, 28mm outer, 21mm inner width\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Toray T700 \/ T800 carbon fiber composite\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWeight Range:\u003c\/strong\u003e 315g (Extreme Light) to 400g (Normal)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTubeless Ready:\u003c\/strong\u003e Compatible with 25–32mm tubeless road tires\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRider Weight Limit:\u003c\/strong\u003e Up to 100kg at 100–125 psi\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eValve \u0026amp; Spoke Compatibility:\u003c\/strong\u003e Standard 6.5mm tubeless valves, 4.5mm spoke holes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUse:\u003c\/strong\u003e Endurance, racing, climbing, custom builds\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e By direct arrangement; details below\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eComparison Table – Bola 30TR28 vs. Peer Rim Designs\u003c\/h3\u003e \u003ctable\u003e \u003ctr\u003e\n\u003cth\u003eRim Model\u003c\/th\u003e\n\u003cth\u003eProfile\u003c\/th\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003cth\u003eWidth (O\/I)\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBola 30TR28\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30mm U-shape\u003c\/td\u003e\n\u003ctd\u003e315–400g\u003c\/td\u003e\n\u003ctd\u003e28\/21mm\u003c\/td\u003e\n\u003ctd\u003eClimbing, all-around\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eReserve Carbon 40\u003c\/td\u003e\n\u003ctd\u003e40mm Hookless\u003c\/td\u003e\n\u003ctd\u003eUnlisted\u003c\/td\u003e\n\u003ctd\u003eUnlisted\u003c\/td\u003e\n\u003ctd\u003eAll-round, disc\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eW23-4550 Wave\u003c\/td\u003e\n\u003ctd\u003e45–50mm Wave\u003c\/td\u003e\n\u003ctd\u003e410g\u003c\/td\u003e\n\u003ctd\u003e23mm inner\u003c\/td\u003e\n\u003ctd\u003eAero, CX\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eDT30S\u003c\/td\u003e\n\u003ctd\u003e30mm Tubular\u003c\/td\u003e\n\u003ctd\u003e290–350g\u003c\/td\u003e\n\u003ctd\u003e25mm outer\u003c\/td\u003e\n\u003ctd\u003eRace\/tubular\u003c\/td\u003e\n\u003c\/tr\u003e \u003c\/table\u003e \u003ch3\u003eFAQs\u003c\/h3\u003e \u003cdl\u003e \u003cdt\u003eWhat are the key benefits of a 30mm profile carbon rim?\u003c\/dt\u003e \u003cdd\u003e30mm rims balance aerodynamic efficiency with lightness—ideal for climbing and versatile road racing.\u003c\/dd\u003e \u003cdt\u003eHow do weight classes (Normal, Superlight, Ultra Light, Extreme Light) impact ride?\u003c\/dt\u003e \u003cdd\u003eLighter rims offer quicker acceleration; heavier tiers prioritize strength. Choose based on rider weight, terrain, and usage.\u003c\/dd\u003e \u003cdt\u003eAre 28mm wide rims suitable for endurance cycling and 28–32mm tires?\u003c\/dt\u003e \u003cdd\u003eYes, 28mm outer and 21mm inner widths optimize handling, reduce pinch flats, and improve comfort on modern tires.\u003c\/dd\u003e \u003cdt\u003eHow much weight can switching to Ultra Light or Extreme Light save?\u003c\/dt\u003e \u003cdd\u003eUltra\/Extreme Light versions are up to 85g lighter per rim versus Normal, translating to better climbing performance.\u003c\/dd\u003e \u003cdt\u003eWhat certifications\/testing apply?\u003c\/dt\u003e \u003cdd\u003eManufactured using EN 14781 standards and independently impact-tested to \u0026gt;300kg compressive strength.\u003c\/dd\u003e \u003c\/dl\u003e \u003ch3\u003eKnown Tradeoffs\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eExtreme\/lightest tiers may offer lower maximum rider weight and require more careful handling.\u003c\/li\u003e \u003cli\u003eLighter weight can result in marginally less lateral stiffness versus heavier rims in hard cornering.\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eWarranty \u0026amp; Support\u003c\/h3\u003e \u003cp\u003eContact Bola Carbon for custom warranty support and coverage for commercial, team, or personal use. Manufactured in compliance with ISO and EN standards.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Carbon Road Rim 700C 30mm Profile 28mm Wide Tubeless Ready – 315–400g\",\n  \"description\": \"Lightweight 700C Carbon Road Rim for Tubeless Setup Lead answer: Bola's 700C carbon road rim features a 30mm aerodynamic profile, 28mm outer width, and four weight classes (315–400g) to match diverse cycling disciplines. Tubeless ready and constructed from Toray T700\/T800 carbon, it's engineered for efficient climbing, endurance racing, and premium road performance. Key Specifications Rim Dimensions: 700C size, 30mm depth, 28mm outer, 21mm inner width Material: Toray T700 \/ T800 carbon fiber composite Weight Range: 315g (Extreme Light) to 400g (Normal) Tubeless Ready: Compatible with 25–32mm tubeless road tires Rider Weight Limit: Up to 100kg at 100–125 psi Valve \u0026 Spoke Compatibility: Standard 6.5mm tubeless valves, 4.5mm spoke holes Use: Endurance, racing, climbing, custom builds Warranty: By direct arrangement; details below Comparison Table – Bola 30TR28 vs. Peer Rim Designs Rim Model Profile Weight Width (O\/I) Best For Bola 30TR28 30mm U-shape 315–400g 28\/21mm Climbing, all-around Reserve Carbon 40 40mm Hookless Unlisted Unlisted All-round, disc W23-4550 Wave 45–50mm Wave 410g 23mm inner Aero, CX DT30S 30mm Tubular 290–350g 25mm outer Race\/tubular FAQs What are the key benefits of a 30mm profile carbon rim? 30mm rims balance aerodynamic efficiency with lightness—ideal for climbing and versatile road racing. How do weight classes (Normal, Superlight, Ultra Light, Extreme Light) impact ride? Lighter rims offer quicker acceleration; heavier tiers prioritize strength. Choose based on rider weight, terrain, and usage. Are 28mm wide rims suitable for endurance cycling and 28–32mm tires? Yes, 28mm outer and 21mm inner widths optimize handling, reduce pinch flats, and improve comfort on modern tires. How much weight can switching to Ultra Light or Extreme Light save? Ultra\/Extreme Light versions are up to 85g lighter per rim versus Normal, translating to better climbing performance. What certifications\/testing apply? Manufactured using EN 14781 standards and independently impact-tested to \u003e300kg compressive strength. Known Tradeoffs Extreme\/lightest tiers may offer lower maximum rider weight and require more careful handling. Lighter weight can result in marginally less lateral stiffness versus heavier rims in hard cornering. Warranty \u0026 Support Contact Bola Carbon for custom warranty support and coverage for commercial, team, or personal use. 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Depth, 28mm Wide (Hook\/Hookless) | Bola\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAnswer:\u003c\/strong\u003e This high-performance 700c carbon rim by Bola offers a 55mm aero profile, tubeless compatibility, and a 28mm external width for optimal efficiency and tire interface. Available in hook (21mm internal) or hookless (23mm internal) configurations, it suits competitive cycling, endurance rides, or urban speed applications. Designed for use with modern disc brake systems.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 700C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRim Depth\/Height:\u003c\/strong\u003e 55mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExternal Width:\u003c\/strong\u003e 28mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Width:\u003c\/strong\u003e 21mm (hook) \/ 23mm (hookless)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRim Shape:\u003c\/strong\u003e U-shape aero\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eERD:\u003c\/strong\u003e 528mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Range:\u003c\/strong\u003e 100-125 psi (check tire compatibility)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAthlete Weight Limit:\u003c\/strong\u003e 120kg\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight Options:\u003c\/strong\u003e 430g (ultra light) – 515g\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-strength carbon fiber (3K\/UD finish option)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrake Compatibility:\u003c\/strong\u003e Disc brakes only\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTubeless Ready:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eComparison Table\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eSpecification\u003c\/th\u003e\n    \u003cth\u003eBola 55mm\u003c\/th\u003e\n    \u003cth\u003eTypical 45mm Rim\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eDepth\u003c\/td\u003e\n    \u003ctd\u003e55mm\u003c\/td\u003e\n    \u003ctd\u003e45mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eExternal Width\u003c\/td\u003e\n    \u003ctd\u003e28mm\u003c\/td\u003e\n    \u003ctd\u003e25-27mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eTubeless Ready\u003c\/td\u003e\n    \u003ctd\u003eYes\u003c\/td\u003e\n    \u003ctd\u003eVaries\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eWeight\u003c\/td\u003e\n    \u003ctd\u003e430g–515g\u003c\/td\u003e\n    \u003ctd\u003e~500-600g\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: Are 700c hookless carbon rims compatible with all tubeless road tires?\u003c\/strong\u003e\u003cbr\u003eA: Compatible with most modern 28-32mm tubeless tires rated for hookless designs. Always verify tire manufacturer compatibility for max safe pressure.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: Does a 28mm wide rim improve aerodynamics?\u003c\/strong\u003e\u003cbr\u003eA: 28mm external increases airflow smoothness when paired with 28-30mm tires, reducing drag at high speed, as supported by CFD testing results in recent industry studies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: What is the practical weight difference for race applications?\u003c\/strong\u003e\u003cbr\u003eA: Ultralight (430g) options enhance acceleration and climbing, with slight reduction in impact absorption compared to heavier (515g) builds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: Is this rim certified?\u003c\/strong\u003e\u003cbr\u003eA: All Bola rims are tested to ISO 4210 safety standards and undergo fatigue, impact, and pressure testing for quality assurance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: Disc brake compatibility?\u003c\/strong\u003e\u003cbr\u003eA: Designed exclusively for disc brake systems for consistent high-speed stopping.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eRigorously manufactured by Bola: ten years of dependable supply to cycling brands and teams across Europe and North America. Contact us for OEM and custom options.\u003c\/em\u003e\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Jante Carbone 700c Tubeless 55mm – Profil Haut 28mm Large, Options Hook\/Hookless, Ultra Légère | Bola\",\n  \"description\": \"700c Carbon Tubeless Rim – 55mm Depth, 28mm Wide (Hook\/Hookless) | Bola Answer: This high-performance 700c carbon rim by Bola offers a 55mm aero profile, tubeless compatibility, and a 28mm external width for optimal efficiency and tire interface. Available in hook (21mm internal) or hookless (23mm internal) configurations, it suits competitive cycling, endurance rides, or urban speed applications. Designed for use with modern disc brake systems. Technical Specifications Diameter: 700C Rim Depth\/Height: 55mm External Width: 28mm Internal Width: 21mm (hook) \/ 23mm (hookless) Rim Shape: U-shape aero ERD: 528mm Pressure Range: 100-125 psi (check tire compatibility) Athlete Weight Limit: 120kg Weight Options: 430g (ultra light) – 515g Material: High-strength carbon fiber (3K\/UD finish option) Brake Compatibility: Disc brakes only Tubeless Ready: Yes Comparison Table Specification Bola 55mm Typical 45mm Rim Depth 55mm 45mm External Width 28mm 25-27mm Tubeless Ready Yes Varies Weight 430g–515g ~500-600g FAQ Q: Are 700c hookless carbon rims compatible with all tubeless road tires? A: Compatible with most modern 28-32mm tubeless tires rated for hookless designs. Always verify tire manufacturer compatibility for max safe pressure. Q: Does a 28mm wide rim improve aerodynamics? A: 28mm external increases airflow smoothness when paired with 28-30mm tires, reducing drag at high speed, as supported by CFD testing results in recent industry studies. Q: What is the practical weight difference for race applications? A: Ultralight (430g) options enhance acceleration and climbing, with slight reduction in impact absorption compared to heavier (515g) builds. Q: Is this rim certified? A: All Bola rims are tested to ISO 4210 safety standards and undergo fatigue, impact, and pressure testing for quality assurance. Q: Disc brake compatibility? A: Designed exclusively for disc brake systems for consistent high-speed stopping. Rigorously manufactured by Bola: ten years of dependable supply to cycling brands and teams across Europe and North America. 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430–515g","description":"\u003ch2\u003eBola 700c Carbon Road Rim – 55mm Profile, 28mm Wide, Tubeless Ready\u003c\/h2\u003e\u003cp\u003eThe Bola 55mm carbon rim is a 700c tubeless-ready road rim available in asymmetric or symmetric spoke-bed geometry, with an outer width of 28mm and inner width of 21mm (hooked) or 23mm (hookless). Weight options range from 430g to 515g per rim, making it suitable for race builds and endurance wheelsets alike.\u003c\/p\u003e\u003ch2\u003eWeight Variants\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eGrade\u003c\/th\u003e\n\u003cth\u003eWeight (per rim)\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNormal\u003c\/td\u003e\n\u003ctd\u003e515 ± 15g\u003c\/td\u003e\n\u003ctd\u003eTraining, all-round durability\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuperlight\u003c\/td\u003e\n\u003ctd\u003e465 ± 15g\u003c\/td\u003e\n\u003ctd\u003eBalanced race\/endurance builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUltralight\u003c\/td\u003e\n\u003ctd\u003e450 ± 10g\u003c\/td\u003e\n\u003ctd\u003eRace-day climbing builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtremelight\u003c\/td\u003e\n\u003ctd\u003e430 ± 10g\u003c\/td\u003e\n\u003ctd\u003eMinimum weight, elite competition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cem\u003eTradeoff note:\u003c\/em\u003e Each step toward Extremelight reduces rim weight by approximately 15–35g but narrows manufacturing tolerances. Riders prioritising training longevity should consider Normal or Superlight grades.\u003c\/p\u003e\u003ch2\u003eFull Technical Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim diameter:\u003c\/strong\u003e 700C (ISO 622)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim profile:\u003c\/strong\u003e U-shape, 55mm height\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter width:\u003c\/strong\u003e 28mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner width:\u003c\/strong\u003e 21mm (hooked) \/ 23mm (hookless)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eERD:\u003c\/strong\u003e 528mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpoke hole diameter:\u003c\/strong\u003e 4.5mm (customisable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve hole diameter:\u003c\/strong\u003e 6.5mm (customisable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssembly hole diameter:\u003c\/strong\u003e 7.5mm (customisable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNipple direction:\u003c\/strong\u003e Front 7°; Rear 5° \u0026amp; 7° (customisable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlatness:\u003c\/strong\u003e \u0026lt;0.15mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoundness:\u003c\/strong\u003e \u0026lt;0.3mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic balance:\u003c\/strong\u003e \u0026lt;3g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForward compressive strength:\u003c\/strong\u003e \u0026gt;300kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLateral torsion:\u003c\/strong\u003e \u0026gt;50kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpoke hole tension:\u003c\/strong\u003e \u0026gt;280kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTyre pressure range:\u003c\/strong\u003e 100–125psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum rider weight:\u003c\/strong\u003e 120kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eAsymmetric vs. Symmetric: Which Should You Choose?\u003c\/h2\u003e\u003cp\u003eAsymmetric rims offset the spoke bed to equalise spoke tension between the drive and non-drive sides of a rear wheel, reducing spoke fatigue and improving wheel stiffness under pedalling loads. They are particularly beneficial on rear wheels with cassette-driven dishing. Symmetric rims are preferred for front wheels or custom builds requiring equal flange geometry. Both variants share identical aerodynamic profiles and weight grades.\u003c\/p\u003e\u003ch2\u003eTubeless Compatibility\u003c\/h2\u003e\u003cp\u003eThis rim is compatible with both hooked and hookless tubeless tyre setups. The 21mm inner width (hooked) supports tyres from 25c to 32c; the 23mm hookless variant is optimised for 28c–35c tubeless tyres at pressures up to 125psi. Ensure tyre manufacturer hookless compatibility before using hookless configuration.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eAre these rims compatible with Shimano, Campagnolo, and SRAM cassette bodies?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eRim compatibility depends on hub and spoke count selection, not the cassette standard. These rims are hub-agnostic and support standard J-bend and straight-pull spoke configurations based on customised drilling.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the difference between Ultralight and Extremelight grades?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eUltralight rims weigh 450 ± 10g and suit competitive road racing. Extremelight rims weigh 430 ± 10g and are intended for elite-level competition where every gram is critical. The Extremelight grade has tighter weight tolerances (±10g vs ±15g on Normal\/Superlight) reflecting higher-precision layup.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use these rims for gravel or cyclocross?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThese rims are designed for 700c road cycling. The 55mm aerodynamic profile and 125psi maximum tyre pressure limit their suitability for off-road use where lower pressures and wider tyres are preferred.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat spoke count options are available?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eSpoke hole count and drilling pattern are customisable. Contact Bola directly to specify spoke count for your build.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eDo these rims require a tubeless rim tape?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. Standard tubeless rim tape installation is required to seal spoke holes before mounting a tubeless tyre and sealant.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Asymmetric or symmetric 700c tubeless  carbon rims 55mm profile 28mm outer wide 21mm inner wide,superlight ultralight extremelight optional Bola\",\n  \"description\": \"Bola 700c Carbon Road Rim – 55mm Profile, 28mm Wide, Tubeless Ready The Bola 55mm carbon rim is a 700c tubeless-ready road rim available in asymmetric or symmetric spoke-bed geometry, with an outer width of 28mm and inner width of 21mm (hooked) or 23mm (hookless). Weight options range from 430g to 515g per rim, making it suitable for race builds and endurance wheelsets alike. Weight Variants Grade Weight (per rim) Best For Normal 515 ± 15g Training, all-round durability Superlight 465 ± 15g Balanced race\/endurance builds Ultralight 450 ± 10g Race-day climbing builds Extremelight 430 ± 10g Minimum weight, elite competition Tradeoff note: Each step toward Extremelight reduces rim weight by approximately 15–35g but narrows manufacturing tolerances. Riders prioritising training longevity should consider Normal or Superlight grades. Full Technical Specifications Rim diameter: 700C (ISO 622) Rim profile: U-shape, 55mm height Outer width: 28mm Inner width: 21mm (hooked) \/ 23mm (hookless) ERD: 528mm Spoke hole diameter: 4.5mm (customisable) Valve hole diameter: 6.5mm (customisable) Assembly hole diameter: 7.5mm (customisable) Nipple direction: Front 7°; Rear 5° \u0026amp; 7° (customisable) Flatness: \u0026lt;0.15mm Roundness: \u0026lt;0.3mm Dynamic balance: \u0026lt;3g Forward compressive strength: \u0026gt;300kg Lateral torsion: \u0026gt;50kg Spoke hole tension: \u0026gt;280kg Tyre pressure range: 100–125psi Maximum rider weight: 120kg Asymmetric vs. Symmetric: Which Should You Choose? Asymmetric rims offset the spoke bed to equalise spoke tension between the drive and non-drive sides of a rear wheel, reducing spoke fatigue and improving wheel stiffness under pedalling loads. They are particularly beneficial on rear wheels with cassette-driven dishing. Symmetric rims are preferred for front wheels or custom builds requiring equal flange geometry. Both variants share identical aerodynamic profiles and weight grades. Tubeless Compatibility This rim is compatible with both hooked and hookless tubeless tyre setups. The 21mm inner width (hooked) supports tyres from 25c to 32c; the 23mm hookless variant is optimised for 28c–35c tubeless tyres at pressures up to 125psi. Ensure tyre manufacturer hookless compatibility before using hookless configuration. Frequently Asked Questions Are these rims compatible with Shimano, Campagnolo, and SRAM cassette bodies? Rim compatibility depends on hub and spoke count selection, not the cassette standard. These rims are hub-agnostic and support standard J-bend and straight-pull spoke configurations based on customised drilling. What is the difference between Ultralight and Extremelight grades? Ultralight rims weigh 450 ± 10g and suit competitive road racing. Extremelight rims weigh 430 ± 10g and are intended for elite-level competition where every gram is critical. The Extremelight grade has tighter weight tolerances (±10g vs ±15g on Normal\/Superlight) reflecting higher-precision layup. Can I use these rims for gravel or cyclocross? These rims are designed for 700c road cycling. The 55mm aerodynamic profile and 125psi maximum tyre pressure limit their suitability for off-road use where lower pressures and wider tyres are preferred. What spoke count options are available? Spoke hole count and drilling pattern are customisable. Contact Bola directly to specify spoke count for your build. Do these rims require a tubeless rim tape? Yes. 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Maximum supported rider weight: 120 kg.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Size\u003c\/td\u003e\n\u003ctd\u003e700C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Shape\u003c\/td\u003e\n\u003ctd\u003eU-Shape\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Profile Height\u003c\/td\u003e\n\u003ctd\u003e35mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width\u003c\/td\u003e\n\u003ctd\u003e28mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eERD (Effective Rim Diameter)\u003c\/td\u003e\n\u003ctd\u003e568mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight – Standard Build\u003c\/td\u003e\n\u003ctd\u003e325 ± 15g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight – Superlight Build\u003c\/td\u003e\n\u003ctd\u003e300 ± 10g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTire Compatibility\u003c\/td\u003e\n\u003ctd\u003eTubular only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMin \/ Max Tire Pressure\u003c\/td\u003e\n\u003ctd\u003e100 \/ 125 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Rider Weight\u003c\/td\u003e\n\u003ctd\u003e120 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eStructural Strength Data\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eTest Parameter\u003c\/th\u003e\n\u003cth\u003eResult\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eForward Compressive Strength\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 300 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLateral Torsion Resistance\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 50 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Hole Tension\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 280 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDynamic Equilibrium (imbalance)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlatness Tolerance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoundness Tolerance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eDrilling \u0026amp; Compatibility Details\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssembly Hole Diameter:\u003c\/strong\u003e 7.5mm (customizable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Hole Diameter:\u003c\/strong\u003e 6.5mm (customizable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpoke Hole Diameter:\u003c\/strong\u003e 4.5mm (customizable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNipple Direction:\u003c\/strong\u003e Front 7°; Rear 5° \u0026amp; 7° (customizable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAsymmetric Option:\u003c\/strong\u003e Available – improves spoke tension balance on rear drive-side wheels\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePerformance Tradeoffs to Know\u003c\/h2\u003e\u003cp\u003eThe 35mm profile offers a practical compromise: lower aerodynamic drag than 50mm+ deep-section rims while remaining manageable in crosswind conditions above 40 km\/h. The 28mm outer width supports modern 25–30mm tubular tires for improved contact patch and rolling resistance. \u003cem\u003eNote: this rim is tubular-only and is not compatible with clincher or tubeless tires.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eIs a 35mm carbon rim good for both climbing and flat road cycling?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. At 300–325g per rim, the 35mm profile minimizes rotational weight penalty on climbs while providing measurable aerodynamic benefit on flat and rolling terrain — making it a versatile all-around race rim.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the advantage of the asymmetric option?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eAsymmetric spoke drilling offsets the rim bed laterally, equalizing spoke tension between the drive and non-drive sides on rear wheels. 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Available in two weight tiers: \u003cstrong\u003eNormal (345 ± 15 g)\u003c\/strong\u003e and \u003cstrong\u003eSuperlight (320 ± 10 g)\u003c\/strong\u003e per rim. Suited to road racing, criteriums, and lightweight climbing builds where aerodynamic efficiency and lateral stiffness are priorities.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Size\u003c\/td\u003e\n\u003ctd\u003e700C (ISO 622)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Type\u003c\/td\u003e\n\u003ctd\u003eTubular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile Height\u003c\/td\u003e\n\u003ctd\u003e40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width\u003c\/td\u003e\n\u003ctd\u003e28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Shape\u003c\/td\u003e\n\u003ctd\u003eU-shape\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eERD (Effective Rim Diameter)\u003c\/td\u003e\n\u003ctd\u003e559 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNormal Weight\u003c\/td\u003e\n\u003ctd\u003e345 ± 15 g per rim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuperlight Weight\u003c\/td\u003e\n\u003ctd\u003e320 ± 10 g per rim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForward Compressive Strength\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 300 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLateral Torsion\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 50 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Hole Tension\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 280 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDynamic Equilibrium (imbalance)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlatness Tolerance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoundness Tolerance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMin \/ Max Tire Pressure\u003c\/td\u003e\n\u003ctd\u003e100 \/ 125 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Rider Weight\u003c\/td\u003e\n\u003ctd\u003e120 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e7.5 mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e6.5 mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e4.5 mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNipple Angle – Front\u003c\/td\u003e\n\u003ctd\u003e7°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNipple Angle – Rear\u003c\/td\u003e\n\u003ctd\u003e5° \u0026amp; 7° (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eOffset Rim Design: What It Means for Your Build\u003c\/h2\u003e\u003cp\u003eThe asymmetric spoke bed shifts the rim's centerline toward the non-drive side, equalizing spoke tension across both flanges on the rear wheel. This reduces the tension differential that causes spoke fatigue on standard symmetrical rims, improving wheel durability and lateral stiffness without adding weight.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eTradeoff to consider:\u003c\/em\u003e Offset rims require careful spoke-length calculation and are best built by an experienced wheel builder to realize the tension-balancing benefit.\u003c\/p\u003e\u003ch2\u003e40mm Profile: Climbing and Criterium Use Case\u003c\/h2\u003e\u003cp\u003eA 40mm carbon profile sits in the versatile mid-depth range. Compared to 50mm+ deep-section rims, the 40mm profile offers:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eReduced crosswind sensitivity on exposed climbs and technical criterium circuits\u003c\/li\u003e\n\u003cli\u003eLower rotating mass at 320–345 g, supporting faster acceleration out of corners\u003c\/li\u003e\n\u003cli\u003eCompetitive aerodynamic gain versus shallow-section (25mm or under) alloy rims\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTire type:\u003c\/strong\u003e Tubular only — not compatible with clincher or tubeless tires\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel size:\u003c\/strong\u003e 700C (ISO 622 bead seat diameter)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake type:\u003c\/strong\u003e Rim brake (carbon-specific brake pads required; not disc-brake compatible)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame clearance:\u003c\/strong\u003e 28mm outer rim width is compatible with most road frames accepting 25–32mm tire clearance; verify fork\/chainstay clearance before purchase\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: What is the weight of the superlight version per rim?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: The superlight option weighs 320 ± 10 g per rim, making a paired set approximately 640 g before hub, spokes, and nipples.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: Are these rims compatible with disc-brake road bikes?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: No. These are rim-brake tubular rims. They are not designed or rated for disc-brake calipers.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: What is an offset (asymmetric) carbon rim and why does it matter?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: An offset rim shifts the spoke bed off-center to equalize spoke tension between the drive and non-drive sides on rear wheels, reducing spoke fatigue and improving lateral stiffness.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: Can hole count and spoke hole diameter be customized?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: Yes. Assembly hole diameter (7.5 mm), valve hole diameter (6.5 mm), and spoke hole diameter (4.5 mm) can all be customized. 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It offers a practical balance of aerodynamic benefit and low crosswind sensitivity compared to 50mm+ profiles.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"700C tubular offset carbon bicycle rims 40mm profile 28mm wide,super light option Bola\",\n  \"description\": \"Bola 700C Tubular Offset Carbon Rim – 40mm Profile, 28mm Wide The Bola 700C tubular carbon rim delivers a 40mm aerodynamic profile with a 28mm outer width and an asymmetric (offset) spoke bed design. Available in two weight tiers: Normal (345 ± 15 g) and Superlight (320 ± 10 g) per rim. Suited to road racing, criteriums, and lightweight climbing builds where aerodynamic efficiency and lateral stiffness are priorities. Key Specifications Parameter Value Rim Size 700C (ISO 622) Rim Type Tubular Profile Height 40 mm Outer Width 28 mm Rim Shape U-shape ERD (Effective Rim Diameter) 559 mm Normal Weight 345 ± 15 g per rim Superlight Weight 320 ± 10 g per rim Forward Compressive Strength \u0026gt; 300 kg Lateral Torsion \u0026gt; 50 kg Spoke Hole Tension \u0026gt; 280 kg Dynamic Equilibrium (imbalance) \u0026lt; 3 g Flatness Tolerance \u0026lt; 0.15 mm Roundness Tolerance \u0026lt; 0.3 mm Min \/ Max Tire Pressure 100 \/ 125 psi Max Rider Weight 120 kg Assembly Hole Diameter 7.5 mm (customizable) Valve Hole Diameter 6.5 mm (customizable) Spoke Hole Diameter 4.5 mm (customizable) Nipple Angle – Front 7° Nipple Angle – Rear 5° \u0026amp; 7° (customizable) Offset Rim Design: What It Means for Your Build The asymmetric spoke bed shifts the rim's centerline toward the non-drive side, equalizing spoke tension across both flanges on the rear wheel. This reduces the tension differential that causes spoke fatigue on standard symmetrical rims, improving wheel durability and lateral stiffness without adding weight. Tradeoff to consider: Offset rims require careful spoke-length calculation and are best built by an experienced wheel builder to realize the tension-balancing benefit. 40mm Profile: Climbing and Criterium Use Case A 40mm carbon profile sits in the versatile mid-depth range. Compared to 50mm+ deep-section rims, the 40mm profile offers: Reduced crosswind sensitivity on exposed climbs and technical criterium circuits Lower rotating mass at 320–345 g, supporting faster acceleration out of corners Competitive aerodynamic gain versus shallow-section (25mm or under) alloy rims Compatibility Notes Tire type: Tubular only — not compatible with clincher or tubeless tires Wheel size: 700C (ISO 622 bead seat diameter) Brake type: Rim brake (carbon-specific brake pads required; not disc-brake compatible) Frame clearance: 28mm outer rim width is compatible with most road frames accepting 25–32mm tire clearance; verify fork\/chainstay clearance before purchase Frequently Asked Questions Q: What is the weight of the superlight version per rim? A: The superlight option weighs 320 ± 10 g per rim, making a paired set approximately 640 g before hub, spokes, and nipples. Q: Are these rims compatible with disc-brake road bikes? A: No. These are rim-brake tubular rims. 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Designed for competitive cyclists up to 120 kg, it supports tyre pressures from 100 to 125 psi and is compatible with standard tubular tyre gluing workflows.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim diameter\u003c\/td\u003e\n\u003ctd\u003e700c (ISO 622)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim shape\u003c\/td\u003e\n\u003ctd\u003eU-profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim height\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter rim width\u003c\/td\u003e\n\u003ctd\u003e28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eERD\u003c\/td\u003e\n\u003ctd\u003e539 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight – Standard\u003c\/td\u003e\n\u003ctd\u003e375 ± 15 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight – Superlight\u003c\/td\u003e\n\u003ctd\u003e350 ± 10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForward compressive strength\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 300 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLateral torsion resistance\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 50 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke hole tension\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 280 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDynamic imbalance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlatness tolerance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoundness tolerance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMin \/ Max tyre pressure\u003c\/td\u003e\n\u003ctd\u003e100 \/ 125 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax rider weight\u003c\/td\u003e\n\u003ctd\u003e120 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke hole diameter\u003c\/td\u003e\n\u003ctd\u003e4.5 mm (customisable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve hole diameter\u003c\/td\u003e\n\u003ctd\u003e6.5 mm (customisable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly hole diameter\u003c\/td\u003e\n\u003ctd\u003e7.5 mm (customisable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNipple angle (front)\u003c\/td\u003e\n\u003ctd\u003e7°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNipple angle (rear)\u003c\/td\u003e\n\u003ctd\u003e5° \/ 7° (customisable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eStandard vs. Superlight: Which Should You Choose?\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003estandard build (375 ± 15 g)\u003c\/strong\u003e suits all-around road racing and gran fondo riders who prioritise durability over marginal weight savings. The \u003cstrong\u003esuperlight build (350 ± 10 g)\u003c\/strong\u003e saves approximately 25 g per rim — 50 g per wheelset — making it the preferred choice for climbers and weight-conscious racers where every gram counts.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eTradeoff note:\u003c\/em\u003e The superlight layup uses a reduced resin-to-fibre ratio. Riders who frequently train in wet conditions or on rough roads may prefer the standard build for its slightly higher impact tolerance.\u003c\/p\u003e\u003ch2\u003eWhy 28mm Width Matters\u003c\/h2\u003e\u003cp\u003eAt 28 mm outer width, this rim follows the modern wide-rim standard that improves tyre contact patch stability and allows 25–28 mm tubular tyres to mount at their intended profile. Wind-tunnel data from independent rim manufacturers consistently shows that rims wider than the tyre casing reduce aerodynamic drag compared to narrower rims with the same tyre. The 50 mm rim height provides a balance between aerodynamic advantage on flat and rolling terrain and manageable crosswind sensitivity, making it a versatile choice for criterium racing, road racing, and fast sportives.\u003c\/p\u003e\u003ch2\u003eCompatible Use Cases\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat road racing \u0026amp; criteriums:\u003c\/strong\u003e 50 mm depth provides meaningful aero gains without excessive crosswind penalty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClimbing \u0026amp; mountain stages:\u003c\/strong\u003e Superlight build at 350 g keeps rotating mass low; U-profile maintains structural stiffness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGran fondo \/ endurance riding:\u003c\/strong\u003e Standard 375 g build balances weight and long-term durability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrack \/ velodrome use:\u003c\/strong\u003e Tubular-only mounting, no braking surface (disc\/track configuration)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the best tubular carbon rim for road cycling under 400 grams?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe Bola 700c superlight tubular rim weighs 350 ± 10 g per rim, placing it well under the 400 g threshold. The standard build at 375 ± 15 g also qualifies. Both are full carbon construction.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eIs a 50mm carbon rim good for both climbing and flat road racing?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. A 50 mm depth is widely regarded as an all-round racing depth. It delivers measurable aerodynamic advantage on flat and rolling roads while remaining manageable for most riders in crosswinds. For dedicated mountain-stage climbing, a shallower rim (30–38 mm) would save more rotating weight.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the difference between the superlight and standard weight options?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe superlight build is approximately 25 g lighter per rim (350 g vs. 375 g). Both share identical dimensions and structural geometry. The standard build may offer marginally greater impact resilience for rougher training conditions.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eAre 28mm wide carbon rims better than 25mm for aerodynamics and stability?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eFor tyre widths of 25 mm and above, a 28 mm rim provides a more aerodynamically optimised tyre-to-rim junction and improved cornering stability. Narrower 25 mm rims can create a 'lightbulb' tyre profile that increases drag. The 28 mm outer width on this rim is best paired with 25–28 mm tubular tyres.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat should I look for when buying 700c carbon tubular rims for competitive cycling?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eKey factors: rim weight (under 400 g for climbing; 350–380 g is competitive), rim depth (50 mm suits most road racing), width (28 mm is the modern aero standard), structural strength metrics (this rim: \u0026gt;300 kg forward compression, \u0026gt;280 kg spoke tension), and rim flatness\/roundness tolerances (\u0026lt;0.15 mm \/ \u0026lt;0.3 mm confirm build quality).\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use this rim with a disc brake or rim brake setup?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThis is a tubular-only rim with no dedicated brake track. It is intended for disc brake or track (brakeless) builds. It is not suitable for rim brake use.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Tubular 700c carbon velo rims 50mm height 28mm wide for cycling,super light available Bola\",\n  \"description\": \"Bola 700c Carbon Tubular Rim – 50mm Height, 28mm Wide The Bola 700c carbon tubular rim delivers a verified superlight option at 350 ± 10 g per rim (standard build: 375 ± 15 g), with a U-shaped cross-section optimised for road racing aerodynamics. Designed for competitive cyclists up to 120 kg, it supports tyre pressures from 100 to 125 psi and is compatible with standard tubular tyre gluing workflows. Key Specifications Parameter Value Rim diameter 700c (ISO 622) Rim shape U-profile Rim height 50 mm Outer rim width 28 mm ERD 539 mm Weight – Standard 375 ± 15 g Weight – Superlight 350 ± 10 g Forward compressive strength \u0026gt; 300 kg Lateral torsion resistance \u0026gt; 50 kg Spoke hole tension \u0026gt; 280 kg Dynamic imbalance \u0026lt; 3 g Flatness tolerance \u0026lt; 0.15 mm Roundness tolerance \u0026lt; 0.3 mm Min \/ Max tyre pressure 100 \/ 125 psi Max rider weight 120 kg Spoke hole diameter 4.5 mm (customisable) Valve hole diameter 6.5 mm (customisable) Assembly hole diameter 7.5 mm (customisable) Nipple angle (front) 7° Nipple angle (rear) 5° \/ 7° (customisable) Standard vs. Superlight: Which Should You Choose? The standard build (375 ± 15 g) suits all-around road racing and gran fondo riders who prioritise durability over marginal weight savings. The superlight build (350 ± 10 g) saves approximately 25 g per rim — 50 g per wheelset — making it the preferred choice for climbers and weight-conscious racers where every gram counts. Tradeoff note: The superlight layup uses a reduced resin-to-fibre ratio. Riders who frequently train in wet conditions or on rough roads may prefer the standard build for its slightly higher impact tolerance. Why 28mm Width Matters At 28 mm outer width, this rim follows the modern wide-rim standard that improves tyre contact patch stability and allows 25–28 mm tubular tyres to mount at their intended profile. Wind-tunnel data from independent rim manufacturers consistently shows that rims wider than the tyre casing reduce aerodynamic drag compared to narrower rims with the same tyre. The 50 mm rim height provides a balance between aerodynamic advantage on flat and rolling terrain and manageable crosswind sensitivity, making it a versatile choice for criterium racing, road racing, and fast sportives. Compatible Use Cases Flat road racing \u0026amp; criteriums: 50 mm depth provides meaningful aero gains without excessive crosswind penalty Climbing \u0026amp; mountain stages: Superlight build at 350 g keeps rotating mass low; U-profile maintains structural stiffness Gran fondo \/ endurance riding: Standard 375 g build balances weight and long-term durability Track \/ velodrome use: Tubular-only mounting, no braking surface (disc\/track configuration) Frequently Asked Questions What is the best tubular carbon rim for road cycling under 400 grams? The Bola 700c superlight tubular rim weighs 350 ± 10 g per rim, placing it well under the 400 g threshold. The standard build at 375 ± 15 g also qualifies. Both are full carbon construction. Is a 50mm carbon rim good for both climbing and flat road racing? Yes. A 50 mm depth is widely regarded as an all-round racing depth. It delivers measurable aerodynamic advantage on flat and rolling roads while remaining manageable for most riders in crosswinds. For dedicated mountain-stage climbing, a shallower rim (30–38 mm) would save more rotating weight. What is the difference between the superlight and standard weight options? The superlight build is approximately 25 g lighter per rim (350 g vs. 375 g). Both share identical dimensions and structural geometry. The standard build may offer marginally greater impact resilience for rougher training conditions. Are 28mm wide carbon rims better than 25mm for aerodynamics and stability? For tyre widths of 25 mm and above, a 28 mm rim provides a more aerodynamically optimised tyre-to-rim junction and improved cornering stability. Narrower 25 mm rims can create a 'lightbulb' tyre profile that increases drag. The 28 mm outer width on this rim is best paired with 25–28 mm tubular tyres. What should I look for when buying 700c carbon tubular rims for competitive cycling? Key factors: rim weight (under 400 g for climbing; 350–380 g is competitive), rim depth (50 mm suits most road racing), width (28 mm is the modern aero standard), structural strength metrics (this rim: \u0026gt;300 kg forward compression, \u0026gt;280 kg spoke tension), and rim flatness\/roundness tolerances (\u0026lt;0.15 mm \/ \u0026lt;0.3 mm confirm build quality). Can I use this rim with a disc brake or rim brake setup? This is a tubular-only rim with no dedicated brake track. It is intended for disc brake or track (brakeless) builds. 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It is compatible with tubeless tires from 25mm to 32mm and supports tire pressures between 100 and 125 psi.\u003c\/p\u003e\u003ch2\u003eWeight Tiers at a Glance\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eTier\u003c\/th\u003e\n\u003cth\u003eWeight per Rim\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNormal\u003c\/td\u003e\n\u003ctd\u003e415 ± 15 g\u003c\/td\u003e\n\u003ctd\u003eAll-around training and racing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuperlight\u003c\/td\u003e\n\u003ctd\u003e370 ± 10 g\u003c\/td\u003e\n\u003ctd\u003eGran fondo, mixed-terrain racing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUltra Light\u003c\/td\u003e\n\u003ctd\u003e350 ± 10 g\u003c\/td\u003e\n\u003ctd\u003eRoad racing, criteriums\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtreme Light\u003c\/td\u003e\n\u003ctd\u003e330 ± 10 g\u003c\/td\u003e\n\u003ctd\u003eClimbing, lightweight race builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cem\u003eTradeoff note: Lighter tiers (Ultra Light \/ Extreme Light) sacrifice some impact resistance. Recommended for competitive race use by riders under 120 kg; heavier riders or training use should consider Normal or Superlight.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eFull Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim Size:\u003c\/strong\u003e 700C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim Profile:\u003c\/strong\u003e U-shape\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e 35mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Width:\u003c\/strong\u003e 28mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Width:\u003c\/strong\u003e 21mm (fits 25mm–32mm tires optimally)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eERD:\u003c\/strong\u003e 569mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForward Compressive Strength:\u003c\/strong\u003e \u0026gt;300 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLateral Torsion:\u003c\/strong\u003e \u0026gt;50 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpoke Hole Tension:\u003c\/strong\u003e \u0026gt;280 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Balance:\u003c\/strong\u003e \u0026lt;3 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlatness:\u003c\/strong\u003e \u0026lt;0.15mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoundness:\u003c\/strong\u003e \u0026lt;0.3mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTire Pressure Range:\u003c\/strong\u003e 100–125 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Rider Weight:\u003c\/strong\u003e 120 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Hole Diameter:\u003c\/strong\u003e 6.5mm (customizable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpoke Hole Diameter:\u003c\/strong\u003e 4.5mm (customizable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssembly Hole Diameter:\u003c\/strong\u003e 7.5mm (customizable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNipple Direction:\u003c\/strong\u003e Front 7°; Rear 5° and 7° (or custom)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAsymmetric Option:\u003c\/strong\u003e Available — offsets spoke bed to equalize drive-side and non-drive-side spoke tension on rear wheels\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRim Width \u0026amp; Tire Compatibility\u003c\/h2\u003e\u003cp\u003eThe 21mm inner width follows the ETRTO standard recommendation for pairing with 25mm–32mm tubeless road tires. A 25mm tire on a 21mm inner-width rim mounts closer to 27mm actual width, improving aerodynamics and reducing rolling resistance versus narrower rims. A 28mm tire mounts to approximately 29–30mm, optimizing comfort and grip.\u003c\/p\u003e\u003ch2\u003e35mm Depth: Aerodynamics vs. Climbing\u003c\/h2\u003e\u003cp\u003eAt 35mm, this rim offers a moderate aero profile suitable for flat-to-rolling road racing while remaining manageable in crosswind conditions above 40 km\/h. Compared to 45–50mm deep rims, the 35mm depth saves 30–60g per rim (depending on manufacturer) and reduces lateral wind sensitivity, making it a practical choice for hilly road races and climbs where both weight and drag matter.\u003c\/p\u003e\u003ch2\u003eAsymmetric Design Explained\u003c\/h2\u003e\u003cp\u003eThe asymmetric option shifts the spoke-bed centerline 2–3mm toward the drive side on rear wheels. This reduces the spoke tension differential between drive-side and non-drive-side spokes, producing a more evenly stressed, stiffer, and more durable wheel build — particularly relevant for wide-flange hubs or high-spoke-count race builds.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: Are these rims compatible with rim-brake or disc-brake only?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: This rim is designed for disc-brake use only. No braking surface is present on the rim sidewall.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: What tire width range does the 21mm inner width support?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: The 21mm inner width is optimized for 25mm–32mm tubeless road tires per ETRTO fitment guidelines.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: What is the difference between Superlight (370g) and Extreme Light (330g)?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: The 40g difference per rim (80g per wheelset) comes from reduced laminate thickness in higher-stress zones. Extreme Light rims are intended for race-day use by riders prioritizing climbing performance; Superlight rims offer a more durable option for regular race training.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: Do I need a specific spoke count or hub for the asymmetric version?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: The asymmetric rim is compatible with standard spoke counts (24H–28H) and benefits most when used with wide-flange rear hubs common in disc-brake wheelsets.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: Are custom drilling options available?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: Yes. Valve hole, spoke hole, and assembly hole diameters are available in custom sizes. Contact Bola directly for custom specifications.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"700C tubeless super light carbon race rim 35mm high 28mm outer wide 21mm inner wide,Asymmetric option,ultra light and extreme light  Bola\",\n  \"description\": \"Bola 700C Carbon Tubeless Road Rim – 35mm Deep | 28mm Outer \/ 21mm Inner Width The Bola 35mm carbon tubeless rim is a 700C road racing rim available in four weight tiers — from 415g (standard) down to 330g (Extreme Light) — with an optional asymmetric spoke-bed design for improved spoke tension balance on rear wheels. It is compatible with tubeless tires from 25mm to 32mm and supports tire pressures between 100 and 125 psi. Weight Tiers at a Glance Tier Weight per Rim Best For Normal 415 ± 15 g All-around training and racing Superlight 370 ± 10 g Gran fondo, mixed-terrain racing Ultra Light 350 ± 10 g Road racing, criteriums Extreme Light 330 ± 10 g Climbing, lightweight race builds Tradeoff note: Lighter tiers (Ultra Light \/ Extreme Light) sacrifice some impact resistance. Recommended for competitive race use by riders under 120 kg; heavier riders or training use should consider Normal or Superlight. 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A 25mm tire on a 21mm inner-width rim mounts closer to 27mm actual width, improving aerodynamics and reducing rolling resistance versus narrower rims. A 28mm tire mounts to approximately 29–30mm, optimizing comfort and grip. 35mm Depth: Aerodynamics vs. Climbing At 35mm, this rim offers a moderate aero profile suitable for flat-to-rolling road racing while remaining manageable in crosswind conditions above 40 km\/h. Compared to 45–50mm deep rims, the 35mm depth saves 30–60g per rim (depending on manufacturer) and reduces lateral wind sensitivity, making it a practical choice for hilly road races and climbs where both weight and drag matter. Asymmetric Design Explained The asymmetric option shifts the spoke-bed centerline 2–3mm toward the drive side on rear wheels. This reduces the spoke tension differential between drive-side and non-drive-side spokes, producing a more evenly stressed, stiffer, and more durable wheel build — particularly relevant for wide-flange hubs or high-spoke-count race builds. Frequently Asked Questions Q: Are these rims compatible with rim-brake or disc-brake only? A: This rim is designed for disc-brake use only. No braking surface is present on the rim sidewall. Q: What tire width range does the 21mm inner width support? A: The 21mm inner width is optimized for 25mm–32mm tubeless road tires per ETRTO fitment guidelines. Q: What is the difference between Superlight (370g) and Extreme Light (330g)? A: The 40g difference per rim (80g per wheelset) comes from reduced laminate thickness in higher-stress zones. Extreme Light rims are intended for race-day use by riders prioritizing climbing performance; Superlight rims offer a more durable option for regular race training. 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Available in hooked (21mm inner width) and hookless (23mm inner width) configurations, it supports tire widths from 25c to 32c and a maximum tire pressure of 125 psi (hooked) in line with ETRTO 2023 tubeless standards.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Size\u003c\/td\u003e\n\u003ctd\u003e700c\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Profile\u003c\/td\u003e\n\u003ctd\u003eU-shape\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Depth\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width\u003c\/td\u003e\n\u003ctd\u003e28mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Width\u003c\/td\u003e\n\u003ctd\u003e21mm (hooked) \/ 23mm (hookless)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eERD\u003c\/td\u003e\n\u003ctd\u003e540mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e6.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e4.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e7.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNipple Angle (Front\/Rear)\u003c\/td\u003e\n\u003ctd\u003e7° \/ 5°–7° (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMin \/ Max Tire Pressure\u003c\/td\u003e\n\u003ctd\u003e100 \/ 125 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Rider Weight\u003c\/td\u003e\n\u003ctd\u003e120 kg (264 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWeight Options\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eGrade\u003c\/th\u003e\n\u003cth\u003eWeight per Rim\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003e470 ± 15 g\u003c\/td\u003e\n\u003ctd\u003eTraining, durability-focused builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuper Light\u003c\/td\u003e\n\u003ctd\u003e430 ± 15 g\u003c\/td\u003e\n\u003ctd\u003eAll-round racing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUltra Light\u003c\/td\u003e\n\u003ctd\u003e390 ± 10 g\u003c\/td\u003e\n\u003ctd\u003eClimbing and lightweight builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtreme Light\u003c\/td\u003e\n\u003ctd\u003e370 ± 10 g\u003c\/td\u003e\n\u003ctd\u003eWeight-optimized race builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cem\u003eNote: Lighter grades use a reduced layup schedule. While the Extreme Light option (370 ± 10 g) offers the lowest rotating mass, the Standard grade (470 ± 15 g) provides greater impact resistance for rougher road surfaces or heavier riders approaching the 120 kg limit.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eStructural Performance Data\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eForward Compressive Strength:\u003c\/strong\u003e \u0026gt;300 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLateral Torsion Resistance:\u003c\/strong\u003e \u0026gt;50 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpoke Hole Tension Rating:\u003c\/strong\u003e \u0026gt;280 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Equilibrium (balance):\u003c\/strong\u003e \u0026lt;3 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlatness Tolerance:\u003c\/strong\u003e \u0026lt;0.15 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoundness Tolerance:\u003c\/strong\u003e \u0026lt;0.3 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHooked vs. Hookless: Which Should You Choose?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHooked (21mm inner width):\u003c\/strong\u003e Compatible with all clincher and tubeless road tires. Recommended for riders using tires rated below ETRTO hookless certification, or for mixed-surface use where higher pressures may be needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHookless (23mm inner width):\u003c\/strong\u003e Provides a larger air volume, improved ride compliance, and aerodynamic tire-rim integration at lower pressures (recommended 72–87 psi with compatible tires). Requires ETRTO-approved hookless-compatible tires only.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility \u0026amp; Build Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eTubeless-ready straight from the factory — no conversion tape required on the rim bed\u003c\/li\u003e\n\u003cli\u003eCompatible with standard road hubs (100mm front \/ 130mm or 142mm rear)\u003c\/li\u003e\n\u003cli\u003eSupports both center-lock and 6-bolt disc configurations when spec'd at build\u003c\/li\u003e\n\u003cli\u003eCustom spoke, valve, and assembly hole diameters available on request\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eIs a 28mm wide rim better than 25mm for aerodynamics?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes, for tires 28c and wider. The 28mm outer width creates a continuous aero profile with 28–32c tires, reducing the 'light bulb' effect. For 25c tires, the aerodynamic benefit is marginal but the larger air volume still reduces rolling resistance.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eHow light should a carbon road rim be for climbing?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eFor dedicated climbing builds, rims under 400 g per rim are considered competitive. The Ultra Light (390 g) and Extreme Light (370 g) grades fall within this range. Riders prioritizing durability over pure weight should select the Standard (470 g) or Super Light (430 g) grade.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eAre hookless rims safe for road cycling?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes, when used with ETRTO-certified hookless-compatible tires at the manufacturer's recommended pressure (typically 72–87 psi for road). The hookless bead design is used by major OEM wheel manufacturers and is validated under ETRTO 2023 tubeless road standards.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat tire sizes are compatible with this rim?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe 21mm hooked inner width is optimized for 25c–32c tires. The 23mm hookless inner width is best matched to 28c–35c tires for an aerodynamically flush profile.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eDoes this rim come with a warranty?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. A three-year manufacturer's warranty covers structural defects under normal riding conditions. Warranty excludes crash damage and use outside the stated rider weight or pressure limits.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"700c tubeless carbon road rim 50mm high 28mm outer wide 21mm hooked inner wide or 23mm hookless inner width,super ultra or extreme light option Bola\",\n  \"description\": \"Bola 700c Carbon Tubeless Road Rim — 50mm Deep, 28mm Wide The Bola 50mm carbon tubeless road rim delivers a measurable aerodynamic and compliance advantage for road racing, gran fondo, and endurance riding. Available in hooked (21mm inner width) and hookless (23mm inner width) configurations, it supports tire widths from 25c to 32c and a maximum tire pressure of 125 psi (hooked) in line with ETRTO 2023 tubeless standards. Key Specifications Parameter Value Wheel Size 700c Rim Profile U-shape Rim Depth 50mm Outer Width 28mm Inner Width 21mm (hooked) \/ 23mm (hookless) ERD 540mm Valve Hole Diameter 6.5mm (customizable) Spoke Hole Diameter 4.5mm (customizable) Assembly Hole Diameter 7.5mm (customizable) Nipple Angle (Front\/Rear) 7° \/ 5°–7° (customizable) Min \/ Max Tire Pressure 100 \/ 125 psi Max Rider Weight 120 kg (264 lb) Weight Options Grade Weight per Rim Best For Standard 470 ± 15 g Training, durability-focused builds Super Light 430 ± 15 g All-round racing Ultra Light 390 ± 10 g Climbing and lightweight builds Extreme Light 370 ± 10 g Weight-optimized race builds Note: Lighter grades use a reduced layup schedule. While the Extreme Light option (370 ± 10 g) offers the lowest rotating mass, the Standard grade (470 ± 15 g) provides greater impact resistance for rougher road surfaces or heavier riders approaching the 120 kg limit. Structural Performance Data Forward Compressive Strength: \u0026gt;300 kg Lateral Torsion Resistance: \u0026gt;50 kg Spoke Hole Tension Rating: \u0026gt;280 kg Dynamic Equilibrium (balance): \u0026lt;3 g Flatness Tolerance: \u0026lt;0.15 mm Roundness Tolerance: \u0026lt;0.3 mm Hooked vs. Hookless: Which Should You Choose? Hooked (21mm inner width): Compatible with all clincher and tubeless road tires. Recommended for riders using tires rated below ETRTO hookless certification, or for mixed-surface use where higher pressures may be needed. Hookless (23mm inner width): Provides a larger air volume, improved ride compliance, and aerodynamic tire-rim integration at lower pressures (recommended 72–87 psi with compatible tires). Requires ETRTO-approved hookless-compatible tires only. Compatibility \u0026 Build Notes Tubeless-ready straight from the factory — no conversion tape required on the rim bed Compatible with standard road hubs (100mm front \/ 130mm or 142mm rear) Supports both center-lock and 6-bolt disc configurations when spec'd at build Custom spoke, valve, and assembly hole diameters available on request Frequently Asked Questions Is a 28mm wide rim better than 25mm for aerodynamics? Yes, for tires 28c and wider. The 28mm outer width creates a continuous aero profile with 28–32c tires, reducing the 'light bulb' effect. For 25c tires, the aerodynamic benefit is marginal but the larger air volume still reduces rolling resistance. How light should a carbon road rim be for climbing? For dedicated climbing builds, rims under 400 g per rim are considered competitive. The Ultra Light (390 g) and Extreme Light (370 g) grades fall within this range. Riders prioritizing durability over pure weight should select the Standard (470 g) or Super Light (430 g) grade. Are hookless rims safe for road cycling? Yes, when used with ETRTO-certified hookless-compatible tires at the manufacturer's recommended pressure (typically 72–87 psi for road). The hookless bead design is used by major OEM wheel manufacturers and is validated under ETRTO 2023 tubeless road standards. What tire sizes are compatible with this rim? The 21mm hooked inner width is optimized for 25c–32c tires. The 23mm hookless inner width is best matched to 28c–35c tires for an aerodynamically flush profile. Does this rim come with a warranty? Yes. A three-year manufacturer's warranty covers structural defects under normal riding conditions. 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Weight ranges from 345g (ultra-light) to 425g (standard), all tested for \u0026gt;300kg compressive and \u0026gt;50kg lateral strength.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 700c (ISO 622mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e 40mm deep, U-shape, tubeless-ready\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 28mm external, 21mm or 23mm internal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eERD:\u003c\/strong\u003e 559mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight Options:\u003c\/strong\u003e 425±15g \/ 390±10g \/ 365±10g \/ 345±10g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrength:\u003c\/strong\u003e \u0026gt;300kg compressive, \u0026gt;50kg lateral torsion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpoke Hole Tension:\u003c\/strong\u003e \u0026gt;280kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Tolerance:\u003c\/strong\u003e \u0026lt;3g\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReal-World Suitability\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCompetitive road racing wheelsets: optimize for high strength-to-weight\u003c\/li\u003e\n\u003cli\u003eEndurance builds and Gran Fondo: choose lighter weight versions for less rotational mass\u003c\/li\u003e\n\u003cli\u003eWheel builders tailoring stiffness: asymmetric model improves left\/right spoke tension balance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eComparison Table: Internal Width Options\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eInternal Width\u003c\/th\u003e\n\u003cth\u003eTire Compatibility\u003c\/th\u003e\n\u003cth\u003eRim Weight Range\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e21mm\u003c\/td\u003e\n\u003ctd\u003e23–32mm\u003c\/td\u003e\n\u003ctd\u003e345–425g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e23mm\u003c\/td\u003e\n\u003ctd\u003e25–35mm\u003c\/td\u003e\n\u003ctd\u003e345–425g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cdl\u003e\n\u003cdt\u003eWhat’s the difference between 21mm and 23mm inner width?\u003c\/dt\u003e\n\u003cdd\u003e23mm inner width is preferred for larger volume tires (25–35mm) or mixed-surface use, offering improved stability and cornering. 21mm supports traditional 23–28mm race tires for classic road builds.\u003c\/dd\u003e\n\u003cdt\u003eShould I select asymmetric or symmetric?\u003c\/dt\u003e\n\u003cdd\u003eAsymmetric improves left\/right spoke tension for disc brake or high-torque builds; symmetric suits classic rim brake or standard hubs.\u003c\/dd\u003e\n\u003cdt\u003eIs this rim suited for both climbing and flats?\u003c\/dt\u003e\n\u003cdd\u003eThe 40mm profile balances aero performance for fast flats and manageable weight for climbing, validated by peer data and real-world rider feedback.\u003c\/dd\u003e\n\u003cdt\u003eWhat certifications or testing standards are used?\u003c\/dt\u003e\n\u003cdd\u003eEach rim batch is tested for ISO 4210-7 compliance, with documented pass\/fail records. 3-year limited warranty. Custom drilling available on request.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"700c Carbon Road Rim 40mm – Tubeless, 28mm Wide, Asymmetric or Symmetric, 345–425g\",\n  \"description\": \"700c Tubeless Carbon Road Rim: 40mm Profile, 28mm Wide Answer-first: This 700c carbon road rim combines a 40mm aerodynamic profile, tubeless-ready clincher design, and 28mm wide external width—ideal for road racing, endurance builds, and premium custom wheelsets. Choose from asymmetric or symmetric options and 21mm or 23mm internal widths. Weight ranges from 345g (ultra-light) to 425g (standard), all tested for \u003e300kg compressive and \u003e50kg lateral strength. Key Specifications Diameter: 700c (ISO 622mm) Profile: 40mm deep, U-shape, tubeless-ready Width: 28mm external, 21mm or 23mm internal ERD: 559mm Weight Options: 425±15g \/ 390±10g \/ 365±10g \/ 345±10g Strength: \u0026gt;300kg compressive, \u0026gt;50kg lateral torsion Spoke Hole Tension: \u0026gt;280kg Dynamic Tolerance: \u0026lt;3g Real-World Suitability Competitive road racing wheelsets: optimize for high strength-to-weight Endurance builds and Gran Fondo: choose lighter weight versions for less rotational mass Wheel builders tailoring stiffness: asymmetric model improves left\/right spoke tension balance Comparison Table: Internal Width Options Internal Width Tire Compatibility Rim Weight Range 21mm 23–32mm 345–425g 23mm 25–35mm 345–425g FAQ What’s the difference between 21mm and 23mm inner width? 23mm inner width is preferred for larger volume tires (25–35mm) or mixed-surface use, offering improved stability and cornering. 21mm supports traditional 23–28mm race tires for classic road builds. Should I select asymmetric or symmetric? Asymmetric improves left\/right spoke tension for disc brake or high-torque builds; symmetric suits classic rim brake or standard hubs. Is this rim suited for both climbing and flats? The 40mm profile balances aero performance for fast flats and manageable weight for climbing, validated by peer data and real-world rider feedback. What certifications or testing standards are used? Each rim batch is tested for ISO 4210-7 compliance, with documented pass\/fail records. 3-year limited warranty. 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Carbon Tubeless Rim\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDirect answer:\u003c\/strong\u003e The Bola 700c 45mm asymmetric carbon tubeless rim is designed for competitive road cycling and endurance rides, offering advanced aerodynamics and weight options for custom wheel builds. Choose between hookless or hooked bead variants, 21mm or 23mm inner widths, and weights from 375g to 460g to optimize your performance and tire compatibility.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSize: 700c (ISO 622)\u003c\/li\u003e\n\u003cli\u003eDepth: 45mm (U-shape asymmetric offset)\u003c\/li\u003e\n\u003cli\u003eWidth: 28mm outer \/ 21mm or 23mm inner\u003c\/li\u003e\n\u003cli\u003eWeight Options: Extreme-Light 375g, Ultra-Light 380g, Super-Light 405g, Standard 460g (± tolerances)\u003c\/li\u003e\n\u003cli\u003eBead Type: Hooked or Hookless (ETRTO compatible)\u003c\/li\u003e\n\u003cli\u003eSpoke Hole: 4.5mm diameter, for disc\/rim brake hubs\u003c\/li\u003e\n\u003cli\u003eMax Rider Weight: 100kg\u003c\/li\u003e\n\u003cli\u003eRecommended Tire Size: 25–32mm tubeless-ready (100–125 psi)\u003c\/li\u003e\n\u003cli\u003eMaterial: T700\/T800 unidirectional carbon fiber, epoxy matrix\u003c\/li\u003e\n\u003cli\u003eDynamic Balance: \u0026lt;3g deviation\u003c\/li\u003e\n\u003cli\u003eFlatness Tolerance: \u0026lt;0.15mm; Roundness: \u0026lt;0.3mm\u003c\/li\u003e\n\u003cli\u003eWarranty: 3 years\u003c\/li\u003e\n\u003cli\u003eCertifications: ISO 622, ETRTO bead compatibility, dynamic balance and flatness tested\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eComparison Table\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eBola 45TR28\u003c\/th\u003e\n\u003cth\u003eTypical Competitor\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eAsymmetric, U-shape\u003c\/td\u003e\n\u003ctd\u003eSymmetric or wave\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Width\u003c\/td\u003e\n\u003ctd\u003e21\/23mm\u003c\/td\u003e\n\u003ctd\u003e23-25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e375–460g\u003c\/td\u003e\n\u003ctd\u003e330–460g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBead Type\u003c\/td\u003e\n\u003ctd\u003eHooked \/ Hookless\u003c\/td\u003e\n\u003ctd\u003eVaries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePuncture Risk\u003c\/td\u003e\n\u003ctd\u003eLow (tubeless ready)\u003c\/td\u003e\n\u003ctd\u003eLow (tubeless ready)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Rider Weight\u003c\/td\u003e\n\u003ctd\u003e100kg\u003c\/td\u003e\n\u003ctd\u003e90–105kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eISO 622 \/ ETRTO\u003c\/td\u003e\n\u003ctd\u003eStated or unspecified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What are the main advantages of an asymmetric rim design?\u003c\/strong\u003e\u003cbr\u003eA: Asymmetric rims balance spoke tension for increased wheel durability and reduce lateral flex in disc brake setups, compared to symmetric designs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: When should I use hookless vs. hooked bead?\u003c\/strong\u003e\u003cbr\u003eA: Hookless beads support lower tire pressures and reduced weight; hooked beads allow a wider tire pressure and standard clinchers. Always verify tire compatibility for hookless use above 70psi.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Is the Bola 45TR28 suitable for long distance or racing?\u003c\/strong\u003e\u003cbr\u003eA: Yes. Its low weight and aerodynamic profile make it ideal for endurance, race, and high-performance urban builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: How does it compare for safety at sub-400g weights?\u003c\/strong\u003e\u003cbr\u003eA: All rim weights meet ISO 622 and dynamic balance testing. Extreme-Light (375g) is best for riders ≤85kg and smooth surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What tire sizes and pressures are supported?\u003c\/strong\u003e\u003cbr\u003eA: Designed for 25–32mm tubeless tires, up to 125psi (hooked) or 100psi (hookless as per ETRTO guidelines).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Bola 700c 45mm Asymmetric Carbon Tubeless Road Rim – 28mm Wide, Hook or Hookless, 375–460g\",\n  \"description\": \"Bola 700c 45mm Asymmetric Carbon Tubeless Rim Direct answer: The Bola 700c 45mm asymmetric carbon tubeless rim is designed for competitive road cycling and endurance rides, offering advanced aerodynamics and weight options for custom wheel builds. Choose between hookless or hooked bead variants, 21mm or 23mm inner widths, and weights from 375g to 460g to optimize your performance and tire compatibility. Key Features Size: 700c (ISO 622) Depth: 45mm (U-shape asymmetric offset) Width: 28mm outer \/ 21mm or 23mm inner Weight Options: Extreme-Light 375g, Ultra-Light 380g, Super-Light 405g, Standard 460g (± tolerances) Bead Type: Hooked or Hookless (ETRTO compatible) Spoke Hole: 4.5mm diameter, for disc\/rim brake hubs Max Rider Weight: 100kg Recommended Tire Size: 25–32mm tubeless-ready (100–125 psi) Material: T700\/T800 unidirectional carbon fiber, epoxy matrix Dynamic Balance: Flatness Tolerance: Warranty: 3 years Certifications: ISO 622, ETRTO bead compatibility, dynamic balance and flatness tested Comparison Table Parameter Bola 45TR28 Typical Competitor Profile Asymmetric, U-shape Symmetric or wave Inner Width 21\/23mm 23-25mm Weight 375–460g 330–460g Bead Type Hooked \/ Hookless Varies Puncture Risk Low (tubeless ready) Low (tubeless ready) Max Rider Weight 100kg 90–105kg Certifications ISO 622 \/ ETRTO Stated or unspecified FAQs Q: What are the main advantages of an asymmetric rim design? A: Asymmetric rims balance spoke tension for increased wheel durability and reduce lateral flex in disc brake setups, compared to symmetric designs. Q: When should I use hookless vs. hooked bead? A: Hookless beads support lower tire pressures and reduced weight; hooked beads allow a wider tire pressure and standard clinchers. Always verify tire compatibility for hookless use above 70psi. Q: Is the Bola 45TR28 suitable for long distance or racing? A: Yes. Its low weight and aerodynamic profile make it ideal for endurance, race, and high-performance urban builds. Q: How does it compare for safety at sub-400g weights? A: All rim weights meet ISO 622 and dynamic balance testing. Extreme-Light (375g) is best for riders ≤85kg and smooth surfaces. Q: What tire sizes and pressures are supported? 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At equivalent weight grades, the 45mm rim offers marginally better handling in variable wind conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50mm depth:\u003c\/strong\u003e Preferred for flat or rolling routes where aerodynamic efficiency gains outweigh the slight increase in crosswind sensitivity. Delivers measurable drag reduction at speeds above 35 km\/h.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eTradeoff note:\u003c\/em\u003e The 50mm depth rim provides greater aerodynamic advantage on flat roads but requires more rider input in crosswinds above approximately 20 km\/h. The 45mm depth is recommended for riders prioritizing all-conditions confidence.\u003c\/p\u003e\n\u003ch2\u003e28mm Wide Rim: Performance Advantages\u003c\/h2\u003e\n\u003cp\u003eA 28mm outer width (22mm inner) accommodates 28–32mm tires at optimal casing pressure, reducing rolling resistance compared to narrower 19–20mm inner-width rims. 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With forward compressive strength exceeding 300 kg and spoke hole tension above 280 kg, all weight grades — including the 360g Extreme Light — are engineered to meet structural durability requirements for regular training use. The 440g Normal and 405g Super Light grades are particularly suited to daily training. Rider weight limit applies at ≤120 kg.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the difference between 45mm and 50mm depth for climbing vs. flat roads?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe 45mm depth reduces rotational inertia and performs more predictably in crosswinds, making it the preferred choice for climbs and variable conditions. The 50mm depth improves aerodynamic efficiency on flat and rolling terrain where sustained high speed is the goal.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eIs a 28mm wide carbon rim better than a 25mm rim for endurance cycling?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eFor endurance applications, the 28mm outer \/ 22mm inner width supports wider, lower-pressure tires that reduce road vibration and rolling resistance over long distances. The wider inner channel also enhances tubeless compatibility and tire stability under load.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhich weight grade should I choose?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe Normal (440g) and Super Light (405g) grades offer the best durability-to-weight ratio for training and endurance racing. The Ultra Light (385g) and Extreme Light (360g) grades are engineered for competitive race-day use where minimum rotating mass is prioritized. 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65mm, 28mm Wide Tubeless\u003c\/h2\u003e\u003cp\u003eThe Bola 700C carbon rim delivers a wave-profile aerodynamic shape in 60mm and 65mm depths with a 28mm outer width, available in three weight tiers: \u003cstrong\u003eNormal (535 ±15g)\u003c\/strong\u003e, \u003cstrong\u003eSuperlight (485 ±15g)\u003c\/strong\u003e, and \u003cstrong\u003eUltralight (430 ±10g)\u003c\/strong\u003e. Tubeless-ready construction supports tire pressures from 100 to 125 psi and accommodates riders up to 120 kg.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Size\u003c\/td\u003e\n\u003ctd\u003e700C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Profile\u003c\/td\u003e\n\u003ctd\u003eWave Aero (U-shape base)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Height\u003c\/td\u003e\n\u003ctd\u003e60mm \/ 65mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width\u003c\/td\u003e\n\u003ctd\u003e28mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Width\u003c\/td\u003e\n\u003ctd\u003e22mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eERD\u003c\/td\u003e\n\u003ctd\u003e515mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight — Normal\u003c\/td\u003e\n\u003ctd\u003e535 ±15g per rim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight — Superlight\u003c\/td\u003e\n\u003ctd\u003e485 ±15g per rim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight — Ultralight\u003c\/td\u003e\n\u003ctd\u003e430 ±10g per rim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForward Compressive Strength\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;300 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLateral Torsion\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;50 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Hole Tension\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;280 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDynamic Equilibrium\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;3g imbalance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlatness Tolerance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoundness Tolerance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly \/ Valve Hole Dia\u003c\/td\u003e\n\u003ctd\u003e7.5mm \/ 6.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Hole Dia\u003c\/td\u003e\n\u003ctd\u003e4.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNipple Direction (Front)\u003c\/td\u003e\n\u003ctd\u003e7°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNipple Direction (Rear)\u003c\/td\u003e\n\u003ctd\u003e5° and 7° (or customized)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTire Pressure Range\u003c\/td\u003e\n\u003ctd\u003e100–125 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Rider Weight\u003c\/td\u003e\n\u003ctd\u003e120 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWeight Tier Comparison\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eTier\u003c\/th\u003e\n\u003cth\u003eWeight per Rim\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNormal\u003c\/td\u003e\n\u003ctd\u003e535 ±15g\u003c\/td\u003e\n\u003ctd\u003eTraining, durability-focused builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuperlight\u003c\/td\u003e\n\u003ctd\u003e485 ±15g\u003c\/td\u003e\n\u003ctd\u003eEndurance racing, balanced weight\/stiffness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUltralight\u003c\/td\u003e\n\u003ctd\u003e430 ±10g\u003c\/td\u003e\n\u003ctd\u003eCriterium, climbing, weight-conscious race builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003e60mm vs 65mm Depth — Which Should You Choose?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e60mm:\u003c\/strong\u003e Lower crosswind sensitivity; suited to mixed-terrain road racing, gran fondo, and riders in variable wind conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e65mm:\u003c\/strong\u003e Greater aerodynamic advantage at speeds above 40 km\/h; preferred for triathlon, time trial, and flat-course racing where crosswind risk is managed.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWave Aero Profile — What It Means\u003c\/h2\u003e\u003cp\u003eThe wave aero (toroidal) rim wall creates a smoother airflow reattachment point compared to a flat-wall U-shape rim. This geometry reduces aerodynamic drag at yaw angles typically encountered during road and triathlon racing (5°–15° yaw). \u003cem\u003eNote: aerodynamic advantage is most measurable above 35–40 km\/h; at lower average speeds, weight savings from the Ultralight tier typically provide a greater performance return.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eTubeless Compatibility\u003c\/h2\u003e\u003cp\u003eThe 22mm inner width accepts tires from 25mm to 32mm in tubeless or clincher configuration. The rim bed, valve hole diameter (6.5mm, customizable), and assembly hole (7.5mm, customizable) are designed for standard tubeless valve stems and tape installation.\u003c\/p\u003e\u003ch2\u003eCustomization Options\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpoke hole diameter: standard 4.5mm or custom\u003c\/li\u003e\n\u003cli\u003eValve hole diameter: standard 6.5mm or custom\u003c\/li\u003e\n\u003cli\u003eAssembly hole diameter: standard 7.5mm or custom\u003c\/li\u003e\n\u003cli\u003eNipple angle: Front 7°; Rear 5°, 7°, or custom\u003c\/li\u003e\n\u003cli\u003eRim height: 60mm or 65mm\u003c\/li\u003e\n\u003cli\u003eWeight tier: Normal, Superlight, or Ultralight\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the actual weight of the ultralight version?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe Ultralight tier weighs 430 ±10g per rim (420–440g), verified per-unit at the factory before shipping.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eAre these rims tubeless-ready out of the box?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The rim bed is tubeless-compatible. You will need tubeless tape, a valve stem, and tubeless sealant, which are not included.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eIs a 60mm or 65mm rim better for triathlon and time trial?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe 65mm depth offers greater aerodynamic benefit on flat, controlled courses. The 60mm depth is the more versatile choice if your event includes variable wind or slight elevation.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat tire widths are compatible with the 22mm inner width?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eETRTO guidelines recommend tires 1.4× to 2.4× the inner rim width. For a 22mm inner width, this translates to approximately 25mm–50mm tires; for road use, 25mm–32mm is the practical range.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the maximum rider weight?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe rim is rated for riders up to 120 kg combined system weight (rider + bike + gear).\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan spoke count and hole configuration be customized?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. Contact Bola directly with your spoke count, lacing pattern, and nipple angle requirements before ordering.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat warranty does Bola offer?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eBola provides a three-year manufacturer's warranty covering manufacturing defects in materials and workmanship.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"700C 28mm wide tubeless carbon bike rim 60mm and 65mm wave aero dynamic shape,ultra or super light optional Bola\",\n  \"description\": \"700C Carbon Road Bike Rim — Wave Aero Profile, 60mm \u0026amp; 65mm, 28mm Wide Tubeless The Bola 700C carbon rim delivers a wave-profile aerodynamic shape in 60mm and 65mm depths with a 28mm outer width, available in three weight tiers: Normal (535 ±15g) , Superlight (485 ±15g) , and Ultralight (430 ±10g) . Tubeless-ready construction supports tire pressures from 100 to 125 psi and accommodates riders up to 120 kg. Key Specifications Specification Value Rim Size 700C Rim Profile Wave Aero (U-shape base) Rim Height 60mm \/ 65mm Outer Width 28mm Inner Width 22mm ERD 515mm Weight — Normal 535 ±15g per rim Weight — Superlight 485 ±15g per rim Weight — Ultralight 430 ±10g per rim Forward Compressive Strength \u0026gt;300 kg Lateral Torsion \u0026gt;50 kg Spoke Hole Tension \u0026gt;280 kg Dynamic Equilibrium \u0026lt;3g imbalance Flatness Tolerance \u0026lt;0.15mm Roundness Tolerance \u0026lt;0.3mm Assembly \/ Valve Hole Dia 7.5mm \/ 6.5mm (customizable) Spoke Hole Dia 4.5mm (customizable) Nipple Direction (Front) 7° Nipple Direction (Rear) 5° and 7° (or customized) Tire Pressure Range 100–125 psi Max Rider Weight 120 kg Weight Tier Comparison Tier Weight per Rim Best For Normal 535 ±15g Training, durability-focused builds Superlight 485 ±15g Endurance racing, balanced weight\/stiffness Ultralight 430 ±10g Criterium, climbing, weight-conscious race builds 60mm vs 65mm Depth — Which Should You Choose? 60mm: Lower crosswind sensitivity; suited to mixed-terrain road racing, gran fondo, and riders in variable wind conditions. 65mm: Greater aerodynamic advantage at speeds above 40 km\/h; preferred for triathlon, time trial, and flat-course racing where crosswind risk is managed. Wave Aero Profile — What It Means The wave aero (toroidal) rim wall creates a smoother airflow reattachment point compared to a flat-wall U-shape rim. This geometry reduces aerodynamic drag at yaw angles typically encountered during road and triathlon racing (5°–15° yaw). Note: aerodynamic advantage is most measurable above 35–40 km\/h; at lower average speeds, weight savings from the Ultralight tier typically provide a greater performance return. Tubeless Compatibility The 22mm inner width accepts tires from 25mm to 32mm in tubeless or clincher configuration. The rim bed, valve hole diameter (6.5mm, customizable), and assembly hole (7.5mm, customizable) are designed for standard tubeless valve stems and tape installation. Customization Options Spoke hole diameter: standard 4.5mm or custom Valve hole diameter: standard 6.5mm or custom Assembly hole diameter: standard 7.5mm or custom Nipple angle: Front 7°; Rear 5°, 7°, or custom Rim height: 60mm or 65mm Weight tier: Normal, Superlight, or Ultralight Frequently Asked Questions What is the actual weight of the ultralight version? The Ultralight tier weighs 430 ±10g per rim (420–440g), verified per-unit at the factory before shipping. Are these rims tubeless-ready out of the box? Yes. The rim bed is tubeless-compatible. You will need tubeless tape, a valve stem, and tubeless sealant, which are not included. Is a 60mm or 65mm rim better for triathlon and time trial? The 65mm depth offers greater aerodynamic benefit on flat, controlled courses. The 60mm depth is the more versatile choice if your event includes variable wind or slight elevation. What tire widths are compatible with the 22mm inner width? ETRTO guidelines recommend tires 1.4× to 2.4× the inner rim width. For a 22mm inner width, this translates to approximately 25mm–50mm tires; for road use, 25mm–32mm is the practical range. What is the maximum rider weight? The rim is rated for riders up to 120 kg combined system weight (rider + bike + gear). Can spoke count and hole configuration be customized? Yes. Contact Bola directly with your spoke count, lacing pattern, and nipple angle requirements before ordering. What warranty does Bola offer? 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