{"title":"700C 34mm","description":"\u003cp\u003eWe are a bike rim manufacturer in China With rich experience in Carbon bike rim and Carbon wheelset, with Competitive price and top quality.\u003c\/p\u003e","products":[{"product_id":"700c-40mm-carbon-road-rim-30mm-or-34mm-wide-23mm-inner-width-tubeless-ready-bola","title":"700c 40mm Carbon Road Rim – 30mm or 34mm Wide, 23mm Inner Width, Tubeless Ready | Bola","description":"\u003ch2\u003e700c 40mm Carbon Road Rim – 30mm or 34mm Outer Width, 23mm Inner Width\u003c\/h2\u003e\u003cp\u003eThe Bola 40mm carbon road rim delivers a verified weight range of 380–430g per rim across three build grades, a 23mm inner width for compatibility with 25–32mm road and gravel tires, and a UV-cured resin finish. Available in 30mm and 34mm outer widths, this rim is designed for competitive road racing, endurance cycling, and OEM partnerships with small to medium cycling brands and professional teams.\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 Diameter\u003c\/td\u003e\n\u003ctd\u003e700c (ISO 622mm BSD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile Height\u003c\/td\u003e\n\u003ctd\u003e40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width\u003c\/td\u003e\n\u003ctd\u003e30mm or 34mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Width\u003c\/td\u003e\n\u003ctd\u003e23mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eERD\u003c\/td\u003e\n\u003ctd\u003e558mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Shape\u003c\/td\u003e\n\u003ctd\u003eU \/ UV profile (hookless-compatible)\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)\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° or 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\u003eRider Weight Limit\u003c\/td\u003e\n\u003ctd\u003e≤120 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWeight Grade Comparison\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\u003e430 ±15g\u003c\/td\u003e\n\u003ctd\u003eTraining, club racing, OEM builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuperlight\u003c\/td\u003e\n\u003ctd\u003e400 ±10g\u003c\/td\u003e\n\u003ctd\u003eEndurance racing, gran fondo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUltralight\u003c\/td\u003e\n\u003ctd\u003e380 ±10g\u003c\/td\u003e\n\u003ctd\u003eRoad criterium, climbing-focused race builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eStructural Strength Testing\u003c\/h3\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:\u003c\/strong\u003e \u0026gt;280 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Equilibrium (imbalance):\u003c\/strong\u003e \u0026lt;3g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlatness tolerance:\u003c\/strong\u003e \u0026lt;0.15mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoundness tolerance:\u003c\/strong\u003e \u0026lt;0.3mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e30mm vs. 34mm Outer Width – Which Should You Choose?\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003e34mm outer width\u003c\/strong\u003e provides a wider tire-to-rim interface, improving aerodynamic performance when paired with 28–32mm tires by reducing the turbulent 'light bulb' effect at the tire shoulder. The \u003cstrong\u003e30mm outer width\u003c\/strong\u003e suits riders prioritizing lower rotational weight and compatibility with narrower 25–28mm tire setups. Both widths share the same 23mm inner width and 40mm profile, so wheel stiffness and spoke tension behavior remain comparable across both configurations.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eNote: The ultralight grade (380 ±10g) achieves its weight reduction through selective carbon layup optimization. Riders exceeding 90 kg or competing on rough road surfaces may prefer the standard or superlight grade for additional fatigue resistance.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eCustomization \u0026amp; OEM Availability\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpoke hole count: customizable per order\u003c\/li\u003e\n\u003cli\u003eHole diameters (valve, spoke, assembly): customizable\u003c\/li\u003e\n\u003cli\u003eNipple angle: front 7°, rear 5° or 7°, or custom specification\u003c\/li\u003e\n\u003cli\u003ePrivate label and OEM branding available for cycling brands and professional teams\u003c\/li\u003e\n\u003cli\u003eThree-year warranty included on all grades\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTire type:\u003c\/strong\u003e Clincher, tubeless-ready (with compatible tape and valves)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended tire width:\u003c\/strong\u003e 25–32mm (700c)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivetrain compatibility:\u003c\/strong\u003e Compatible with all standard road groupsets via cassette body selection at wheel build stage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake type:\u003c\/strong\u003e Disc brake only (no braking surface machined)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eAre these carbon rims tubeless compatible?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The 23mm inner width and U\/UV rim shape are tubeless-ready when used with appropriate rim tape (recommend 25mm width) and tubeless valve stems with a 6.5mm hole diameter. Maximum tire pressure is 125 psi.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the difference between the superlight and ultralight grades?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe superlight grade (400 ±10g) uses a balanced carbon layup suitable for most competitive road and endurance applications. The ultralight grade (380 ±10g) reduces weight by approximately 20g per rim through a refined layup schedule. Both pass the same structural tests; however, the ultralight grade is recommended for riders under 85 kg on smooth road surfaces.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eIs a 34mm wide rim better than 30mm for road aerodynamics?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eFor tires 28mm and wider, the 34mm outer width reduces the tire-rim shoulder gap, which wind tunnel data from rim manufacturers consistently shows improves aerodynamic efficiency above 35 km\/h. For 25mm tires, the 30mm outer width maintains a better aerodynamic profile ratio.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat tire pressure should I use with these rims?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe rated range is 100–125 psi. For tubeless setups with 28mm tires, most riders perform well at 70–90 psi, though the structural rating remains 100 psi minimum for clincher use. Always verify with your tire manufacturer's pressure guidelines.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I order custom spoke hole counts or private-label branding?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. Spoke hole count, hole diameters, nipple angles, and OEM\/private-label branding are all available as custom configurations. Contact us with your technical drawing or specification sheet for a production quote.\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 super or ultra light carbon cycling rim 40mm profile 34mm or 30mm outer wide 23mm inner wide,fat body,Bola\",\n  \"description\": \"700c 40mm Carbon Road Rim – 30mm or 34mm Outer Width, 23mm Inner Width The Bola 40mm carbon road rim delivers a verified weight range of 380–430g per rim across three build grades, a 23mm inner width for compatibility with 25–32mm road and gravel tires, and a UV-cured resin finish. Available in 30mm and 34mm outer widths, this rim is designed for competitive road racing, endurance cycling, and OEM partnerships with small to medium cycling brands and professional teams. Key Specifications Specification Value Rim Diameter 700c (ISO 622mm BSD) Profile Height 40mm Outer Width 30mm or 34mm Inner Width 23mm ERD 558mm Rim Shape U \/ UV profile (hookless-compatible) Valve Hole Diameter 6.5mm (customizable) Spoke Hole Diameter 4.5mm (customizable) Assembly Hole Diameter 7.5mm (customizable) Nipple Angle (Front) 7° Nipple Angle (Rear) 5° or 7° (customizable) Min \/ Max Tire Pressure 100 \/ 125 psi Rider Weight Limit ≤120 kg Weight Grade Comparison Grade Weight per Rim Best For Standard 430 ±15g Training, club racing, OEM builds Superlight 400 ±10g Endurance racing, gran fondo Ultralight 380 ±10g Road criterium, climbing-focused race builds Structural Strength Testing Forward Compressive Strength: \u0026gt;300 kg Lateral Torsion Resistance: \u0026gt;50 kg Spoke Hole Tension: \u0026gt;280 kg Dynamic Equilibrium (imbalance): \u0026lt;3g Flatness tolerance: \u0026lt;0.15mm Roundness tolerance: \u0026lt;0.3mm 30mm vs. 34mm Outer Width – Which Should You Choose? The 34mm outer width provides a wider tire-to-rim interface, improving aerodynamic performance when paired with 28–32mm tires by reducing the turbulent 'light bulb' effect at the tire shoulder. The 30mm outer width suits riders prioritizing lower rotational weight and compatibility with narrower 25–28mm tire setups. Both widths share the same 23mm inner width and 40mm profile, so wheel stiffness and spoke tension behavior remain comparable across both configurations. Note: The ultralight grade (380 ±10g) achieves its weight reduction through selective carbon layup optimization. Riders exceeding 90 kg or competing on rough road surfaces may prefer the standard or superlight grade for additional fatigue resistance. Customization \u0026amp; OEM Availability Spoke hole count: customizable per order Hole diameters (valve, spoke, assembly): customizable Nipple angle: front 7°, rear 5° or 7°, or custom specification Private label and OEM branding available for cycling brands and professional teams Three-year warranty included on all grades Compatibility Tire type: Clincher, tubeless-ready (with compatible tape and valves) Recommended tire width: 25–32mm (700c) Drivetrain compatibility: Compatible with all standard road groupsets via cassette body selection at wheel build stage Brake type: Disc brake only (no braking surface machined) Frequently Asked Questions Are these carbon rims tubeless compatible? Yes. The 23mm inner width and U\/UV rim shape are tubeless-ready when used with appropriate rim tape (recommend 25mm width) and tubeless valve stems with a 6.5mm hole diameter. Maximum tire pressure is 125 psi. What is the difference between the superlight and ultralight grades? The superlight grade (400 ±10g) uses a balanced carbon layup suitable for most competitive road and endurance applications. The ultralight grade (380 ±10g) reduces weight by approximately 20g per rim through a refined layup schedule. Both pass the same structural tests; however, the ultralight grade is recommended for riders under 85 kg on smooth road surfaces. Is a 34mm wide rim better than 30mm for road aerodynamics? For tires 28mm and wider, the 34mm outer width reduces the tire-rim shoulder gap, which wind tunnel data from rim manufacturers consistently shows improves aerodynamic efficiency above 35 km\/h. For 25mm tires, the 30mm outer width maintains a better aerodynamic profile ratio. What tire pressure should I use with these rims? The rated range is 100–125 psi. For tubeless setups with 28mm tires, most riders perform well at 70–90 psi, though the structural rating remains 100 psi minimum for clincher use. Always verify with your tire manufacturer's pressure guidelines. Can I order custom spoke hole counts or private-label branding? Yes. Spoke hole count, hole diameters, nipple angles, and OEM\/private-label branding are all available as custom configurations. 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This disc brake-specific rim features high-modulus carbon fiber construction, verified weights (370–445g by grade), and robust fatigue-tested tolerances, aligning with professional standards for small to medium cycling brands, teams, and experienced riders.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRim Diameter:\u003c\/strong\u003e 700c (ISO 622mm BSD)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfile Height:\u003c\/strong\u003e 50mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOuter Width:\u003c\/strong\u003e 34mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Width:\u003c\/strong\u003e 28mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEffective Rim Diameter (ERD):\u003c\/strong\u003e 538mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRim Shape:\u003c\/strong\u003e U profile (hooked, disc brake only)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValve Hole:\u003c\/strong\u003e 6.5mm (customizable)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpoke Hole:\u003c\/strong\u003e 4.5mm (customizable)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNipple Angle (Front\/Rear):\u003c\/strong\u003e 7° (front), 5° or 7° (rear; customizable)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 370–445g per rim, dependent on layup grade\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Pressure:\u003c\/strong\u003e 100–125 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRider Weight Limit:\u003c\/strong\u003e ≤120kg\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-modulus carbon fiber, UV-cure resin\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAerodynamics \u0026amp; Tire Fit Comparison\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eOuter Width\u003c\/th\u003e\n\u003cth\u003eBest for Tire Size\u003c\/th\u003e\n\u003cth\u003eUse-case\u003c\/th\u003e\n\u003cth\u003eAero Advantage\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e34mm\u003c\/td\u003e\n\u003ctd\u003e28–32mm\u003c\/td\u003e\n\u003ctd\u003eRoad racing, Endurance\u003c\/td\u003e\n\u003ctd\u003eMinimizes air separation for wider tires at \u0026gt;35km\/h\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003ctd\u003e25–28mm\u003c\/td\u003e\n\u003ctd\u003eClimbing, Weight savings\u003c\/td\u003e\n\u003ctd\u003eOptimal for narrower tires and short sprints\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility \u0026amp; Use-Cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eWorks with both clincher and tubeless tires (use 30mm rim tape for tubeless setup)\u003c\/li\u003e\n  \u003cli\u003eEngineered for modern disc-brake road\/gravel bikes\u003c\/li\u003e\n  \u003cli\u003eSupports 25–32mm tires for versatility across road and light gravel surfaces\u003c\/li\u003e\n  \u003cli\u003eCustom spoke hole count and private-label\/OEM capability available\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eQuality, Certifications \u0026amp; Testing\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eForward Compressive Strength: \u0026gt;300kg\u003c\/li\u003e\n  \u003cli\u003eLateral Torsion Resistance: \u0026gt;50kg\u003c\/li\u003e\n  \u003cli\u003eSpoke Hole Tension: \u0026gt;280kg\u003c\/li\u003e\n  \u003cli\u003eDynamic Equilibrium: \u0026lt;3g imbalance\u003c\/li\u003e\n  \u003cli\u003eFlatness tolerance: \u0026lt;0.15mm\u003c\/li\u003e\n  \u003cli\u003eRoundness tolerance: \u0026lt;0.3mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails class=\"gfai-product-faq\" open\u003e\u003csummary\u003e\u003cstrong\u003eIs a 50mm carbon road rim with 34mm outer width good for racing and endurance rides?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThe Bola 50mm\/34mm rim blends aerodynamic efficiency at high speed and stability for wider tire setups, supporting both competitive racing and long-distance use. Tested fatigue strength and U-shape optimize performance for seasoned racers and endurance cyclists.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open\u003e\u003csummary\u003e\u003cstrong\u003eHow does a 700c 50mm tubeless-ready carbon rim compare to a 45mm rim for performance?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eCompared to 45mm rims, the 50mm profile provides improved aerodynamic efficiency at speeds above 35km\/h, particularly with 28–32mm tires. However, 45mm rims offer slightly lower crosswind sensitivity and reduced weight (by approx. 20–30g), which can favor climbing and variable wind conditions.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open\u003e\u003csummary\u003e\u003cstrong\u003eWill a 28mm inner width carbon rim fit 28mm gravel and road tires securely?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes, the 28mm inner width safely accommodates 28mm gravel or road tires, providing optimal sidewall support and maximizing both tubeless sealing and ride stability. This width matches recent industry trends for broad-tire setups used in mixed-surface riding.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open\u003e\u003csummary\u003e\u003cstrong\u003eWhat are the benefits of using a lightweight 700c carbon rim for disc brakes?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eLightweight carbon construction reduces rotational mass for faster acceleration, while disc-specific engineering eliminates the compromise of a brake track, allowing superior fatigue testing, strength, and weight distribution without sacrificing durability or price point.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open\u003e\u003csummary\u003e\u003cstrong\u003eIs a 50mm deep, 34mm wide carbon rim worth the price for competitive cyclists?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eFor competitive cyclists prioritizing aerodynamic performance with modern wide tires (28mm+), this rim delivers a balance of wind-cheating profile, verified strength, and custom build specs uncommon at this price level—especially valuable for private label\/OEM or brand partners seeking proven durability and sustainable costs. Tradeoff: marginally higher profile weight, but with tested fatigue ratings and 3-year warranty for peace of mind.\u003c\/p\u003e\u003c\/details\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Bola 700c 50mm Carbon Road Rim – 34mm Wide, 28mm Inner Width,Tubeless Ready\",\n  \"description\": \"The Bola 700c 50mm Carbon Road Rim with 34mm outer and 28mm inner width is optimized for racing, endurance, and high-speed performance, supporting 25–32mm tubeless or clincher tires for advanced traction and aerodynamic efficiency at competitive speeds. This disc brake-specific rim features high-modulus carbon fiber construction, verified weights (370–445g by grade), and robust fatigue-tested tolerances, aligning with professional standards for small to medium cycling brands, teams, and experienced riders. Technical Specifications Rim Diameter: 700c (ISO 622mm BSD) Profile Height: 50mm Outer Width: 34mm Inner Width: 28mm Effective Rim Diameter (ERD): 538mm Rim Shape: U profile (hooked, disc brake only) Valve Hole: 6.5mm (customizable) Spoke Hole: 4.5mm (customizable) Nipple Angle (Front\/Rear): 7° (front), 5° or 7° (rear; customizable) Weight: 370–445g per rim, dependent on layup grade Max Pressure: 100–125 psi Rider Weight Limit: ≤120kg Material: High-modulus carbon fiber, UV-cure resin Aerodynamics \u0026 Tire Fit Comparison Outer Width Best for Tire Size Use-case Aero Advantage 34mm 28–32mm Road racing, Endurance Minimizes air separation for wider tires at \u003e35km\/h 30mm 25–28mm Climbing, Weight savings Optimal for narrower tires and short sprints Compatibility \u0026 Use-Cases Works with both clincher and tubeless tires (use 30mm rim tape for tubeless setup) Engineered for modern disc-brake road\/gravel bikes Supports 25–32mm tires for versatility across road and light gravel surfaces Custom spoke hole count and private-label\/OEM capability available Quality, Certifications \u0026 Testing Forward Compressive Strength: \u003e300kg Lateral Torsion Resistance: \u003e50kg Spoke Hole Tension: \u003e280kg Dynamic Equilibrium: \u0026lt;3g imbalance Flatness tolerance: \u0026lt;0.15mm Roundness tolerance: \u0026lt;0.3mm Frequently Asked Questions Is a 50mm carbon road rim with 34mm outer width good for racing and endurance rides? The Bola 50mm\/34mm rim blends aerodynamic efficiency at high speed and stability for wider tire setups, supporting both competitive racing and long-distance use. Tested fatigue strength and U-shape optimize performance for seasoned racers and endurance cyclists. How does a 700c 50mm tubeless-ready carbon rim compare to a 45mm rim for performance? Compared to 45mm rims, the 50mm profile provides improved aerodynamic efficiency at speeds above 35km\/h, particularly with 28–32mm tires. However, 45mm rims offer slightly lower crosswind sensitivity and reduced weight (by approx. 20–30g), which can favor climbing and variable wind conditions. Will a 28mm inner width carbon rim fit 28mm gravel and road tires securely? Yes, the 28mm inner width safely accommodates 28mm gravel or road tires, providing optimal sidewall support and maximizing both tubeless sealing and ride stability. This width matches recent industry trends for broad-tire setups used in mixed-surface riding. 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