{"title":"MTB","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":"bola-650b-asymmetric-carbon-gravel-rim-30mm-deep-tubeless-ready","title":"Bola 650B Asymmetric Carbon Gravel Rim, 30mm Deep, 24\/25mm Inner, Tubeless, 330–395g","description":"\u003ch2\u003eBola 650B Asymmetric Carbon Gravel Rim – For Lightweight, High-Performance 650B Builds\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSummary:\u003c\/strong\u003e Bola 650B asymmetric carbon gravel rim offers 30mm depth and a choice of 24mm or 25mm inner width for optimal gravel race performance. Suitable for both competitive and endurance cycling, the rim is tubeless ready and available in hooked or hookless designs. Weight ranges from 330g (Ultralight) to 395g (Normal) per rim. Designed for disc brake systems and tire compatibility of 38c to 50c.\u003c\/p\u003e\n\u003ch3\u003eKey Features \u0026amp; Technical Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim Size:\u003c\/strong\u003e 650B (27.5\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e Asymmetric U-shaped, 30mm deep, 30mm outer width\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Width Options:\u003c\/strong\u003e 24mm or 25mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBead Design:\u003c\/strong\u003e Hooked or hookless options\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight Range:\u003c\/strong\u003e 330g (Ultralight), 355g (Superlight), 395g (Normal) ± tolerance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffective Rim Diameter (ERD):\u003c\/strong\u003e 540mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Carbon fiber (layup optimized for strength-to-weight)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTubeless Ready:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake Compatibility:\u003c\/strong\u003e Disc only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 3 years\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eComparison Table\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eBola 650B\u003c\/th\u003e\n\u003cth\u003eTypical Competitor\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003ctd\u003e34–54mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Width\u003c\/td\u003e\n\u003ctd\u003e24\/25mm\u003c\/td\u003e\n\u003ctd\u003e25–32mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e330–395g\u003c\/td\u003e\n\u003ctd\u003e390–460g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBead\u003c\/td\u003e\n\u003ctd\u003eHooked\/Hookless\u003c\/td\u003e\n\u003ctd\u003eUsually Hookless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAsymmetric\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eOccasional\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\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eEN 14766, ISO 4210-7\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e3 Years\u003c\/td\u003e\n\u003ctd\u003e1–3 Years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBuyer FAQs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What is the optimal inner width for gravel tires (38c–50c)? \u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e 24–25mm inner width supports a broad range of gravel tires with stable sidewalls and secure tubeless fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Is asymmetric rim design beneficial for gravel bikes?\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. Asymmetric profiles improve spoke tension balance and wheel durability, especially under rough-terrain stress.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Should I choose hooked or hookless for tubeless? \u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Hookless supports lower pressures, but check your tire maker for compatibility; hooked is more widely compatible.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e How light is too light for competitive gravel riding? \u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The Ultralight 330g option targets competitors prioritizing acceleration; Superlight and Normal balance weight with durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What standards apply for impact and quality? \u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This rim exceeds EN 14766 and ISO 4210-7 impact and fatigue standards for off-road wheels.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUse Cases\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCustom wheel builds for racing, endurance, or high-performance gravel bikes.\u003c\/li\u003e\n\u003cli\u003eRiders needing lightweight but robust rims for mixed or demanding conditions.\u003c\/li\u003e\n\u003cli\u003eSmall or medium cycling brands requiring a versatile, quality-assured carbon rim component.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Design is optimized for high-endurance and racing scenarios but may show more impact deformation at pressure extremes compared with heavier alternatives.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Carbon Fiber Sporting Goods","offers":[{"title":"UD Matt \/ 28\/28 \/ Normal","offer_id":48093035004158,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ 28\/28 \/ Super 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Two weight options (385g standard, 325g superlight) offer flexibility for racers and technical riders alike.\u003c\/p\u003e\n\u003ch3\u003eKey Features \u0026amp; Technical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-modulus Toray-grade carbon fiber (unidirectional + woven layup)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim Size:\u003c\/strong\u003e 29\" (ISO 622)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e Asymmetric, U-shape; 30mm height, 25mm inner \/ 30mm outer width\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Standard – 385 ± 15g; Superlight – 325 ± 10g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Tire Width:\u003c\/strong\u003e 2.2–2.5\" for optimal performance; ETRTO compatible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrength \u0026amp; Tolerance:\u003c\/strong\u003e Forward compressive \u0026gt;300kg, lateral torsion \u0026gt;50kg, spoke hole tension \u0026gt;280kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing:\u003c\/strong\u003e Individually weighed; flatness \u0026lt;0.15mm; roundness \u0026lt;0.18mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTubeless Ready:\u003c\/strong\u003e Compatible with tubeless and standard clincher tire setups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 3 years, covers manufacturing defects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eComparison: 30mm vs. Deeper MTB Rims\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003e30mm Rim\u003c\/th\u003e\n\u003cth\u003e40mm+ Rim\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eLateral Stiffness\u003c\/td\u003e\n\u003ctd\u003eHigh, for precise tracking\u003c\/td\u003e\n\u003ctd\u003eVery high, increased harshness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAero Drag (XC\/Trail)\u003c\/td\u003e\n\u003ctd\u003eMinimal penalty\u003c\/td\u003e\n\u003ctd\u003eMarginal increase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImpact Resistance\u003c\/td\u003e\n\u003ctd\u003eBalanced\u003c\/td\u003e\n\u003ctd\u003ePotentially less compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSituational Relevance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eXC and all-mountain riders seeking weight savings without sacrificing stability\u003c\/li\u003e\n\u003cli\u003eCustom wheel-builders for performance brands and racing teams\u003c\/li\u003e\n\u003cli\u003eProfessional and enthusiast cyclists requiring verified quality and consistent tolerances\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What are the best 29er carbon rims for XC and all mountain under 400g?\u003c\/strong\u003e\u003cbr\u003eA: Rims like the Bola 29er (325–385g) balance low weight, lateral stiffness, and impact-tested build for XC\/all-mountain racing while retaining tubeless compatibility and an asymmetric profile for balanced spoke tension.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is a 25mm inner width carbon rim good for trail and all mountain MTB tires?\u003c\/strong\u003e\u003cbr\u003eA: Yes, a 25mm inner width supports 2.2–2.5\" tires, offering a stable platform compatible with ETRTO standards, ideal for trail, XC, and all-mountain riding.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are asymmetric carbon rims worth it for 29er builds?\u003c\/strong\u003e\u003cbr\u003eA: Asymmetric rims improve spoke angle balance, enhancing lateral stiffness and reducing stress on the wheel system—advantages confirmed by builder and team experience.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does a 30mm high rim compare to deeper mountain bike rims?\u003c\/strong\u003e\u003cbr\u003eA: A 30mm profile yields strong lateral stiffness with manageable weight and negligible aerodynamic drag, compared to deeper, heavier rims that may be stiffer but less compliant for technical MTB applications.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"29er Carbon MTB Rim 30mm Height 25mm Inner Width – XC \u0026 All Mountain Asymmetric | Bola\",\n  \"description\": \"29er Asymmetric Carbon MTB Rim – 30mm Height, 25mm Inner Width Lead Answer: This 29er carbon mountain bike rim features an asymmetric U-shape design with a 30mm profile and 25mm inner width, optimizing for XC and all-mountain use. Two weight options (385g standard, 325g superlight) offer flexibility for racers and technical riders alike. Key Features \u0026 Technical Specifications Material: High-modulus Toray-grade carbon fiber (unidirectional + woven layup) Rim Size: 29\\\" (ISO 622) Profile: Asymmetric, U-shape; 30mm height, 25mm inner \/ 30mm outer width Weight: Standard – 385 ± 15g; Superlight – 325 ± 10g Recommended Tire Width: 2.2–2.5\\\" for optimal performance; ETRTO compatible Strength \u0026 Tolerance: Forward compressive \u003e300kg, lateral torsion \u003e50kg, spoke hole tension \u003e280kg Manufacturing: Individually weighed; flatness Tubeless Ready: Compatible with tubeless and standard clincher tire setups Warranty: 3 years, covers manufacturing defects Comparison: 30mm vs. Deeper MTB Rims Spec 30mm Rim 40mm+ Rim Lateral Stiffness High, for precise tracking Very high, increased harshness Aero Drag (XC\/Trail) Minimal penalty Marginal increase Impact Resistance Balanced Potentially less compliant Situational Relevance XC and all-mountain riders seeking weight savings without sacrificing stability Custom wheel-builders for performance brands and racing teams Professional and enthusiast cyclists requiring verified quality and consistent tolerances Frequently Asked Questions Q: What are the best 29er carbon rims for XC and all mountain under 400g? 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It is optimized for 2.3\"–2.6\" mountain and 33–40mm cyclocross tire compatibility, all-mountain\/enduro conditions, and is designed for tubeless setups. \u003cstrong\u003eWhy asymmetric design?\u003c\/strong\u003e The offset spoke bed equalizes tension (nipple angle L5°\/R7°), increasing lateral stiffness and wheel durability, especially under heavy torque loads. 3-year manufacturer warranty applies.\u003c\/p\u003e\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-modulus carbon fiber (T700\/T800)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeights:\u003c\/strong\u003e Standard 435g ± 15g; Superlight 370g ± 10g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Width:\u003c\/strong\u003e 30mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim Diameter:\u003c\/strong\u003e 27.5\" \/ 650B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTubeless Ready:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Rider Weight:\u003c\/strong\u003e 100kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTire Pressure:\u003c\/strong\u003e 45–65 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 3 years (manufacturing defects; excludes crash)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompliant with:\u003c\/strong\u003e ISO 4210 standards, internal quality\/QC protocols\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eComparison Table\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eStandard\u003c\/th\u003e\n\u003cth\u003eSuperlight\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e435g ± 15g\u003c\/td\u003e\n\u003ctd\u003e370g ± 10g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended Use\u003c\/td\u003e\n\u003ctd\u003eAll-Mountain\/Enduro\u003c\/td\u003e\n\u003ctd\u003eCyclocross\/XC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Tire Size\u003c\/td\u003e\n\u003ctd\u003e2.6\" MTB\u003c\/td\u003e\n\u003ctd\u003e2.4\" MTB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eFAQs\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Is 30mm inner width suitable for aggressive trail or cyclocross?\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003eA:\u003c\/em\u003e Yes; 30mm offers stable tire support for 2.3–2.6\" MTB and 33–40mm cyclocross tires, improving traction and cornering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What makes an asymmetric carbon rim better?\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003eA:\u003c\/em\u003e Offset profile balances spoke tension, improving strength and long-term trueness compared to standard symmetric rims.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Can I use this rim with standard (non-tubeless) tires?\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003eA:\u003c\/em\u003e Yes; compatible with both tubeless and clincher tires when used with appropriate rim tape.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the expected price range for an ultralight carbon rim under 400g?\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003eA:\u003c\/em\u003e Premium, custom carbon rims in the 350–400g range typically start from $160–$270 USD, depending on spec and warranty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What certifications or testing are performed?\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003eA:\u003c\/em\u003e Each rim is tested to ISO 4210 and internal fatigue\/impact standards, with QC data available on request.\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\": \"Asymmetric Carbon 27.5er MTB Rim – 30mm Inner Width, 435g \/ 370g Ultralight, Tubeless-Ready for All-Mountain \u0026 Cyclocross\",\n  \"description\": \"Asymmetric Carbon 27.5\\\" MTB Rim – 30mm Inner Width, Tubeless-Ready Direct answer: This asymmetric carbon 27.5 MTB rim features a 30mm inner width and supports both standard (435g) and superlight (370g) build grades. It is optimized for 2.3\\\"–2.6\\\" mountain and 33–40mm cyclocross tire compatibility, all-mountain\/enduro conditions, and is designed for tubeless setups. Why asymmetric design? The offset spoke bed equalizes tension (nipple angle L5°\/R7°), increasing lateral stiffness and wheel durability, especially under heavy torque loads. 3-year manufacturer warranty applies. Product Specifications Material: High-modulus carbon fiber (T700\/T800) Weights: Standard 435g ± 15g; Superlight 370g ± 10g Inner Width: 30mm Rim Diameter: 27.5\\\" \/ 650B Tubeless Ready: Yes Max Rider Weight: 100kg Tire Pressure: 45–65 psi Warranty: 3 years (manufacturing defects; excludes crash) Compliant with: ISO 4210 standards, internal quality\/QC protocols Comparison Table Parameter Standard Superlight Weight 435g ± 15g 370g ± 10g Intended Use All-Mountain\/Enduro Cyclocross\/XC Max Tire Size 2.6\\\" MTB 2.4\\\" MTB FAQs Q: Is 30mm inner width suitable for aggressive trail or cyclocross? A: Yes; 30mm offers stable tire support for 2.3–2.6\\\" MTB and 33–40mm cyclocross tires, improving traction and cornering. Q: What makes an asymmetric carbon rim better? A: Offset profile balances spoke tension, improving strength and long-term trueness compared to standard symmetric rims. Q: Can I use this rim with standard (non-tubeless) tires? A: Yes; compatible with both tubeless and clincher tires when used with appropriate rim tape. Q: What is the expected price range for an ultralight carbon rim under 400g? A: Premium, custom carbon rims in the 350–400g range typically start from $160–$270 USD, depending on spec and warranty. Q: What certifications or testing are performed? 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Four weight tiers — 380g, 350g, 325g, and 300g — let riders match rim mass to discipline without changing geometry or spoke count.\u003c\/p\u003e\u003ch2\u003eSpecifications\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\u003e29er (ISO 622mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width\u003c\/td\u003e\n\u003ctd\u003e36mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Width\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile Heights\u003c\/td\u003e\n\u003ctd\u003e20mm \/ 25mm (wave profile)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Count\u003c\/td\u003e\n\u003ctd\u003e28H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eERD\u003c\/td\u003e\n\u003ctd\u003e589mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Hole Dia.\u003c\/td\u003e\n\u003ctd\u003e6.5mm (customisable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Hole Dia.\u003c\/td\u003e\n\u003ctd\u003e4.5mm (customisable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly Hole Dia.\u003c\/td\u003e\n\u003ctd\u003e7.5mm (customisable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNipple Direction\u003c\/td\u003e\n\u003ctd\u003eFront 7°, Rear 5° \u0026amp; 7° (customisable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMin \/ Max Tyre Pressure\u003c\/td\u003e\n\u003ctd\u003e45 \/ 65 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\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\u003eDynamic Balance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;3g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWeight Tiers\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\u003e380 ± 15g\u003c\/td\u003e\n\u003ctd\u003eAll-mountain \/ enduro, prioritises durability\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuperlight\u003c\/td\u003e\n\u003ctd\u003e350 ± 10g\u003c\/td\u003e\n\u003ctd\u003eTrail riding, balanced weight–strength\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUltralight\u003c\/td\u003e\n\u003ctd\u003e325 ± 10g\u003c\/td\u003e\n\u003ctd\u003eXC racing, marginal gains over durability\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtreme Light\u003c\/td\u003e\n\u003ctd\u003e300 ± 10g\u003c\/td\u003e\n\u003ctd\u003eCompetitive XC, lightest option; tighter rider-weight ceiling recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eStructural Strength 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:\u003c\/strong\u003e \u0026gt;280 kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eTradeoff note:\u003c\/em\u003e Moving from the 380g Standard tier to the 300g Extreme Light tier reduces rim mass by ~21% but narrows the safety margin for aggressive rock-garden impacts. Riders over 90 kg or running tubeless at the pressure ceiling (65 psi) are advised to select the Standard or Superlight grade.\u003c\/p\u003e\u003ch2\u003eProfile Selection Guide\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e20mm wave profile:\u003c\/strong\u003e Lower aerodynamic drag, lighter feel — suited to cross-country (XC) and marathon racing where rolling resistance and acceleration matter most.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25mm wave profile:\u003c\/strong\u003e Marginally stiffer lateral platform — better suited to trail and light enduro where cornering precision is prioritised over outright weight.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eTyre compatibility: 2.0–2.6 inch MTB tyres (tubeless-ready with 30mm inner width)\u003c\/li\u003e\n\u003cli\u003eSpoke lacing: 28-hole; compatible with standard J-bend and straight-pull spokes at 4.5mm spoke hole diameter\u003c\/li\u003e\n\u003cli\u003eValve: Presta (6.5mm hole); Schrader adapter not compatible without re-drilling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eIs a 30mm inner wide carbon rim better for aggressive MTB riding than standard width?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. A 30mm inner width seats tyres 2.2–2.6 inch in a wider, rounder profile, improving cornering traction and reducing pinch-flat risk versus a 25mm inner width rim. It meets ETRTO recommendations for modern 29er MTB tyres sized 2.35 and above.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the lightest 29er carbon MTB rim available in this range?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe Extreme Light grade weighs 300 ± 10g per rim. At 290g minimum, it is among the lightest production carbon 29er rims at 36mm outer width. Note the tighter tolerance and the rider-weight guideline of \u0026lt;120 kg applies to all grades.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eShould I choose the 20mm or 25mm profile for cross-country versus enduro?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eChoose the 20mm profile for XC and marathon — lower profile reduces weight and aerodynamic drag at speed. Choose the 25mm profile for trail and enduro — the taller sidewall adds lateral stiffness under cornering loads.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat are the strength and weight tradeoffs between ultralight and standard carbon MTB rims?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe Standard grade (380g) maintains full structural margins across all three strength metrics. Each lighter tier reduces wall thickness incrementally; forward compressive and spoke tension figures remain \u0026gt;300 kg and \u0026gt;280 kg respectively across all grades per Bola's internal testing, but real-world impact resistance decreases as mass drops.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan this rim be set up tubeless?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The 30mm inner width and 4.5mm spoke holes are compatible with standard tubeless tape and valves. Apply at least two full wraps of 33mm tubeless tape to ensure an airtight seal before installing a tubeless valve.\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\": \"29er carbon MTB rim,36mm outer 30mm inner wide,20mm and 25mm wave profile and 28 spoke,superlight and ultra light even exteme light,Bola\",\n  \"description\": \"29er Carbon MTB Rim – Wave Profile, 30mm Inner Wide (Bola) The Bola 29er carbon MTB rim delivers a 36mm outer \/ 30mm inner width with a proprietary wave (wavy) profile in 20mm and 25mm heights, tuned for 28-spoke lacing. Four weight tiers — 380g, 350g, 325g, and 300g — let riders match rim mass to discipline without changing geometry or spoke count. Specifications Parameter Value Rim Diameter 29er (ISO 622mm) Outer Width 36mm Inner Width 30mm Profile Heights 20mm \/ 25mm (wave profile) Spoke Count 28H ERD 589mm Valve Hole Dia. 6.5mm (customisable) Spoke Hole Dia. 4.5mm (customisable) Assembly Hole Dia. 7.5mm (customisable) Nipple Direction Front 7°, Rear 5° \u0026amp; 7° (customisable) Min \/ Max Tyre Pressure 45 \/ 65 psi Max Rider Weight 120 kg Flatness Tolerance \u0026lt;0.15mm Roundness Tolerance \u0026lt;0.3mm Dynamic Balance \u0026lt;3g Weight Tiers Grade Weight per Rim Best For Standard 380 ± 15g All-mountain \/ enduro, prioritises durability Superlight 350 ± 10g Trail riding, balanced weight–strength Ultralight 325 ± 10g XC racing, marginal gains over durability Extreme Light 300 ± 10g Competitive XC, lightest option; tighter rider-weight ceiling recommended Structural Strength Data Forward Compressive Strength: \u0026gt;300 kg Lateral Torsion Resistance: \u0026gt;50 kg Spoke Hole Tension: \u0026gt;280 kg Tradeoff note: Moving from the 380g Standard tier to the 300g Extreme Light tier reduces rim mass by ~21% but narrows the safety margin for aggressive rock-garden impacts. Riders over 90 kg or running tubeless at the pressure ceiling (65 psi) are advised to select the Standard or Superlight grade. Profile Selection Guide 20mm wave profile: Lower aerodynamic drag, lighter feel — suited to cross-country (XC) and marathon racing where rolling resistance and acceleration matter most. 25mm wave profile: Marginally stiffer lateral platform — better suited to trail and light enduro where cornering precision is prioritised over outright weight. Compatibility Tyre compatibility: 2.0–2.6 inch MTB tyres (tubeless-ready with 30mm inner width) Spoke lacing: 28-hole; compatible with standard J-bend and straight-pull spokes at 4.5mm spoke hole diameter Valve: Presta (6.5mm hole); Schrader adapter not compatible without re-drilling Frequently Asked Questions Is a 30mm inner wide carbon rim better for aggressive MTB riding than standard width? Yes. A 30mm inner width seats tyres 2.2–2.6 inch in a wider, rounder profile, improving cornering traction and reducing pinch-flat risk versus a 25mm inner width rim. It meets ETRTO recommendations for modern 29er MTB tyres sized 2.35 and above. What is the lightest 29er carbon MTB rim available in this range? The Extreme Light grade weighs 300 ± 10g per rim. At 290g minimum, it is among the lightest production carbon 29er rims at 36mm outer width. Note the tighter tolerance and the rider-weight guideline of \u0026lt;120 kg applies to all grades. Should I choose the 20mm or 25mm profile for cross-country versus enduro? Choose the 20mm profile for XC and marathon — lower profile reduces weight and aerodynamic drag at speed. Choose the 25mm profile for trail and enduro — the taller sidewall adds lateral stiffness under cornering loads. What are the strength and weight tradeoffs between ultralight and standard carbon MTB rims? The Standard grade (380g) maintains full structural margins across all three strength metrics. Each lighter tier reduces wall thickness incrementally; forward compressive and spoke tension figures remain \u0026gt;300 kg and \u0026gt;280 kg respectively across all grades per Bola's internal testing, but real-world impact resistance decreases as mass drops. Can this rim be set up tubeless? Yes. The 30mm inner width and 4.5mm spoke holes are compatible with standard tubeless tape and valves. Apply at least two full wraps of 33mm tubeless tape to ensure an airtight seal before installing a tubeless valve.\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Carbon Fiber Sporting Goods\"\n  },\n  \"category\": \"Wavy\",\n  \"image\": [\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/mtb_wave.png?v=1733903792\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/29er_wave.png?v=1733903792\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/surface_f1230322-3ddf-4fd0-b237-7adb3e4ce7e9.jpg?v=1767150768\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/29er2.png?v=1736316824\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/redbola_8887e641-3de0-41c4-a66e-78e20cb4c614.jpg?v=1767150768\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/whitebola_b4d67109-868c-42a8-b0df-fde348a22fa0.jpg?v=1767150768\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/yellowbola_fc7a6a6f-184a-49ca-9fe0-5882f00cffe8.jpg?v=1767150768\"\n  ],\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"price\": \"280.00\",\n    \"priceCurrency\": \"USD\",\n    \"url\": \"https:\/\/bolacarbon.com\/products\/29er-carbon-mtb-rim-36mm-outer-30mm-inner-wide-20mm-and-25mm-wave-profile-and-28-spoke-superlight-and-ultra-light-even-exteme-light-bola\",\n    \"seller\": {\n      \"@type\": \"Organization\",\n      \"name\": \"https:\/\/bolacarbon.com\"\n    }\n  }\n}\n\u003c\/script\u003e","brand":"Carbon Fiber Sporting Goods","offers":[{"title":"UD Matt \/ Standard","offer_id":48133210112254,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ Superlight","offer_id":48133210145022,"sku":null,"price":330.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ Ultralight","offer_id":48133210177790,"sku":null,"price":340.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ Standard","offer_id":48133210210558,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ Superlight","offer_id":48133210243326,"sku":null,"price":330.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ Ultralight","offer_id":48133210276094,"sku":null,"price":340.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ Standard","offer_id":48133210308862,"sku":null,"price":330.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ Superlight","offer_id":48133210341630,"sku":null,"price":330.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ Ultralight","offer_id":48133210374398,"sku":null,"price":330.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ Standard","offer_id":48133210407166,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ Superlight","offer_id":48133210439934,"sku":null,"price":330.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ Ultralight","offer_id":48133210472702,"sku":null,"price":340.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/29er_w_set.png?v=1780298414"},{"product_id":"32er-asymmetric-carbon-mtb-rim-30mm-height-30mm-inner-width-tubeless-ready-bola","title":"32er Asymmetric Carbon MTB Rim, 30mm IW, 30mm Height, Tubeless-Ready | BOLA","description":"\u003cp\u003eThe BOLA 32er Asymmetric Carbon MTB Rim is engineered for aggressive trail, enduro, and freeride riding on 32-inch wheel platforms (696mm BSD), supporting 2.3–2.8\" tires with a 30mm inner width for optimal stability and low-pressure performance. This asymmetric U-shaped rim corrects up to 15% spoke-tension imbalance, improving wheel strength and lateral stiffness in high-load corners. Available in standard (450g ±10g) and superlight (350g ±10g) carbon layups.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRim Size:\u003c\/strong\u003e 32er (696mm BSD)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Width:\u003c\/strong\u003e 30mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRim Height:\u003c\/strong\u003e 30mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOuter Width:\u003c\/strong\u003e 36mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEffective Rim Diameter (ERD):\u003c\/strong\u003e 652mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-modulus carbon fiber composite (Toray-grade UD + woven)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e Asymmetric U-shape, tubeless-ready\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight Options:\u003c\/strong\u003e Standard 450g ±10g, Superlight 350g ±10g\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Tire Widths:\u003c\/strong\u003e 2.3–2.8\" MTB tires\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrake Interface:\u003c\/strong\u003e Standard 6-bolt and Centerlock disc\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCertifications \u0026amp; Testing:\u003c\/strong\u003e Forward compressive strength \u0026gt;300kg; Spoke tension \u0026gt;280kg; Lateral torsion \u0026gt;50kg; Dynamic balance tolerance \u0026lt;3g; Flatness \u0026lt;0.15mm (internal QC)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 3 years (structural)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eComparison Table\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eInternal Width\u003c\/th\u003e\n\u003cth\u003eRim Height\u003c\/th\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003cth\u003eRim Size\u003c\/th\u003e\n\u003cth\u003eProfile\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBOLA 32er\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003ctd\u003e350\/450g\u003c\/td\u003e\n\u003ctd\u003e32\" (696mm)\u003c\/td\u003e\n\u003ctd\u003eAsymmetric\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEN932X\u003c\/td\u003e\n\u003ctd\u003e32mm\u003c\/td\u003e\n\u003ctd\u003e26mm\u003c\/td\u003e\n\u003ctd\u003e460g\u003c\/td\u003e\n\u003ctd\u003e29\"\u003c\/td\u003e\n\u003ctd\u003eAsymmetric\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTR930X\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003ctd\u003e390g\u003c\/td\u003e\n\u003ctd\u003e29\"\u003c\/td\u003e\n\u003ctd\u003eAsymmetric\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAM930X\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003ctd\u003e450g\u003c\/td\u003e\n\u003ctd\u003e29\"\u003c\/td\u003e\n\u003ctd\u003eAsymmetric\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePerformance \u0026amp; Use-Cases\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnduro \u0026amp; Freeride:\u003c\/strong\u003e Asymmetric spoke bed reduces tension disparities, increasing wheel durability under aggressive cornering and heavy loads.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Tire Support:\u003c\/strong\u003e 30mm inner width optimizes support for 2.3–2.8 inch tires, offering greater lateral stability than 25–27mm rims. Ideal for low-pressure, high-traction riding.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSuperlight Option:\u003c\/strong\u003e 350g version targets weight-conscious racers needing low mass without compromising on impact test standards (\u0026gt;300kg compressive).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM\/Custom Builds:\u003c\/strong\u003e Custom hole drilling and branding available for small\/medium cycling brands and teams.\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\u003eWhat is the best asymmetric carbon MTB rim for enduro and freeride?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eFor demanding enduro\/freeride use, a rim with at least 30mm inner width, \u0026gt;300kg compressive strength, and tested lateral stiffness is optimal. The BOLA 32er offers these specs, plus asymmetric spoke drilling for improved wheel durability over symmetric options.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open\u003e\u003csummary\u003e\u003cstrong\u003eIs 30mm inner width better than 25mm for aggressive trail riding?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes, a 30mm inner width gives wider tires improved sidewall support, reducing squirm and increasing confidence at lower pressures versus a 25mm rim. This is especially beneficial for 2.4–2.8 inch tires in aggressive trail or enduro conditions.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open\u003e\u003csummary\u003e\u003cstrong\u003eWhat are the advantages of an asymmetric carbon rim?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eAn asymmetric rim offsets the spoke drilling, correcting left\/right tension imbalance common in disc brake wheels by up to 15%. This increases lateral stiffness, improves wheel lifespan, and maintains better trueness under high loads.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open\u003e\u003csummary\u003e\u003cstrong\u003eWhich carbon rim should I choose for 2.6–2.8 inch tires on a 32er?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eSelect a rim with a 30mm or wider internal width. The BOLA 32er has a 30mm inner width that pairs well with 2.3–2.8\" tires, supporting proper tire shape and stability at low pressure.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open\u003e\u003csummary\u003e\u003cstrong\u003eIs the 350g Superlight version strong enough for rough riding?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThe BOLA 32er Superlight rim is independently tested to \u0026gt;300kg forward compressive and \u0026gt;50kg lateral torsion tolerances, suitable for competitive enduro and trail riding, though heavier riders or loaded bikepacking may prefer the 450g standard version for added margin.\u003c\/p\u003e\u003c\/details\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"32er Asymmetric Carbon MTB Rim | 30mm Height, 30mm Inner Width | Tubeless-Ready | BOLA\",\n  \"description\": \"The BOLA 32er Asymmetric Carbon MTB Rim is engineered for aggressive trail, enduro, and freeride riding on 32-inch wheel platforms (696mm BSD), supporting 2.3–2.8\\\" tires with a 30mm inner width for optimal stability and low-pressure performance. This asymmetric U-shaped rim corrects up to 15% spoke-tension imbalance, improving wheel strength and lateral stiffness in high-load corners. Available in standard (450g ±10g) and superlight (350g ±10g) carbon layups. Key Specifications Rim Size: 32er (696mm BSD) Internal Width: 30mm Rim Height: 30mm Outer Width: 36mm Effective Rim Diameter (ERD): 652mm Material: High-modulus carbon fiber composite (Toray-grade UD + woven) Profile: Asymmetric U-shape, tubeless-ready Weight Options: Standard 450g ±10g, Superlight 350g ±10g Compatible Tire Widths: 2.3–2.8\\\" MTB tires Brake Interface: Standard 6-bolt and Centerlock disc Certifications \u0026 Testing: Forward compressive strength \u003e300kg; Spoke tension \u003e280kg; Lateral torsion \u003e50kg; Dynamic balance tolerance Warranty: 3 years (structural) Comparison Table Model Internal Width Rim Height Weight Rim Size Profile BOLA 32er 30mm 30mm 350\/450g 32\\\" (696mm) Asymmetric EN932X 32mm 26mm 460g 29\\\" Asymmetric TR930X 30mm 25mm 390g 29\\\" Asymmetric AM930X 30mm 25mm 450g 29\\\" Asymmetric Performance \u0026 Use-Cases Enduro \u0026 Freeride: Asymmetric spoke bed reduces tension disparities, increasing wheel durability under aggressive cornering and heavy loads. Wide Tire Support: 30mm inner width optimizes support for 2.3–2.8 inch tires, offering greater lateral stability than 25–27mm rims. Ideal for low-pressure, high-traction riding. Superlight Option: 350g version targets weight-conscious racers needing low mass without compromising on impact test standards (\u003e300kg compressive). OEM\/Custom Builds: Custom hole drilling and branding available for small\/medium cycling brands and teams. Frequently Asked Questions What is the best asymmetric carbon MTB rim for enduro and freeride? For demanding enduro\/freeride use, a rim with at least 30mm inner width, \u003e300kg compressive strength, and tested lateral stiffness is optimal. The BOLA 32er offers these specs, plus asymmetric spoke drilling for improved wheel durability over symmetric options. Is 30mm inner width better than 25mm for aggressive trail riding? Yes, a 30mm inner width gives wider tires improved sidewall support, reducing squirm and increasing confidence at lower pressures versus a 25mm rim. This is especially beneficial for 2.4–2.8 inch tires in aggressive trail or enduro conditions. What are the advantages of an asymmetric carbon rim? An asymmetric rim offsets the spoke drilling, correcting left\/right tension imbalance common in disc brake wheels by up to 15%. This increases lateral stiffness, improves wheel lifespan, and maintains better trueness under high loads. Which carbon rim should I choose for 2.6–2.8 inch tires on a 32er? Select a rim with a 30mm or wider internal width. The BOLA 32er has a 30mm inner width that pairs well with 2.3–2.8\\\" tires, supporting proper tire shape and stability at low pressure. Is the 350g Superlight version strong enough for rough riding? The BOLA 32er Superlight rim is independently tested to \u003e300kg forward compressive and \u003e50kg lateral torsion tolerances, suitable for competitive enduro and trail riding, though heavier riders or loaded bikepacking may prefer the 450g standard version for added margin.\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Carbon Fiber Sporting Goods\"\n  },\n  \"category\": \"Carbon Mountain Bike Rim\",\n  \"image\": [\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/bola_wide_carbon_rims_06d7ba22-8510-43b2-adf6-723ae0d55488.png?v=1777519010\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/MTB36-30-29_999e2af1-cdf3-4ac0-8bf4-c502ada9a996.jpg?v=1776493147\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/1_61dd40fe-4d3d-46ba-9e40-acaac8b9845e.png?v=1776493151\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/hookless_c67208cf-a560-4186-95cf-661c89c9ea0a.jpg?v=1776493156\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/redbola_10d621e2-b669-4d10-8cff-9b8ee5ed7b2e.jpg?v=1776493164\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/whitebola_db33f109-976a-4254-8dc5-0d8113333cfd.jpg?v=1776493172\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/yellowbola_a5708686-4006-4f7b-8775-d343a61fa05d.jpg?v=1776493178\"\n  ],\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"price\": \"270.00\",\n    \"priceCurrency\": \"USD\",\n    \"url\": \"https:\/\/bolacarbon.com\/products\/32er-asymmetric-carbon-mtb-rim-30mm-height-30mm-inner-width-tubeless-ready-bola\",\n    \"seller\": {\n      \"@type\": \"Organization\",\n      \"name\": \"https:\/\/bolacarbon.com\"\n    }\n  }\n}\n\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the best asymmetric carbon MTB rim for enduro and freeride?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For demanding enduro\/freeride use, a rim with at least 30mm inner width, \u003e300kg compressive strength, and tested lateral stiffness is optimal. The BOLA 32er offers these specs, plus asymmetric spoke drilling for improved wheel durability over symmetric options.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is 30mm inner width better than 25mm for aggressive trail riding?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, a 30mm inner width gives wider tires improved sidewall support, reducing squirm and increasing confidence at lower pressures versus a 25mm rim. This is especially beneficial for 2.4–2.8 inch tires in aggressive trail or enduro conditions.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What are the advantages of an asymmetric carbon rim?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"An asymmetric rim offsets the spoke drilling, correcting left\/right tension imbalance common in disc brake wheels by up to 15%. This increases lateral stiffness, improves wheel lifespan, and maintains better trueness under high loads.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which carbon rim should I choose for 2.6–2.8 inch tires on a 32er?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Select a rim with a 30mm or wider internal width. 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Designed and tested for high-strength and stability using T700\/T800 unidirectional carbon fiber, this rim supports tubeless tire systems and advanced spoke lacing for 29-inch mountain bikes.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch2\u003eKey Features \u0026amp; Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntended Use:\u003c\/strong\u003e Downhill MTB, enduro, gravity-focused riding\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRim Size:\u003c\/strong\u003e 29\" (ISO 622mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e T700\/T800 unidirectional carbon fiber with epoxy resin matrix\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOuter Width:\u003c\/strong\u003e 40mm  |  \u003cstrong\u003eInner Width:\u003c\/strong\u003e 32mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfile Height:\u003c\/strong\u003e 30mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 620g (±15g per rim)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpoke Count:\u003c\/strong\u003e 28H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eERD:\u003c\/strong\u003e 579mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValve Hole:\u003c\/strong\u003e 6.5mm Presta (customizable)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTire Compatibility:\u003c\/strong\u003e Tubeless-ready, 2.0–2.6\" MTB tires\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Rider Weight:\u003c\/strong\u003e 120kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eStrength \u0026amp; Precision\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMetric\u003c\/th\u003e\n\u003cth\u003eValue\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;300kg\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\u003ctr\u003e\n\u003ctd\u003eLateral Torsion Resistance\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;50kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDynamic Balance\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\n\n\u003ch3\u003eMounting \u0026amp; Use Cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e28-hole design\u003c\/strong\u003e fits standard J-bend and straight-pull spokes (4.5mm spoke hole)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide 32mm inner width\u003c\/strong\u003e maximizes tire stability and traction for aggressive trail and downhill use compared to typical 25-30mm rims\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTubeless-ready\u003c\/strong\u003e with hookless bead for lower pressures and improved puncture resistance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomizable spoke\/valve hole diameters\u003c\/strong\u003e available to fit team or OEM builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBranded Quality\u003c\/h3\u003e\n\u003cp\u003eTrusted by cycling professionals and race teams in Europe and North America, Bola rims are rigorously tested according to ISO 4210-7 (impact and fatigue). Durable, sustainable, and quality-focused — engineered for reliability and high performance at accessible pricing.\u003c\/p\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 29\" \/ 700c wheel systems\u003c\/li\u003e\n  \u003cli\u003eSupports 2.0–2.6\" tubeless MTB tires\u003c\/li\u003e\n  \u003cli\u003eCompatible with Presta valves only (Schrader requires alteration)\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 29er carbon rim with 40mm width good for downhill mountain biking?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes, the 40mm outer\/32mm inner width provides a wide tire bed ideal for downhill. It supports modern tire profiles for increased traction and control on steep or technical descents.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open\u003e\u003csummary\u003e\u003cstrong\u003eWhat are the benefits of a 32mm inner wide rim for aggressive trail riding?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eA 32mm inner rim width allows larger-volume tires to seat with a rounder profile, which improves cornering stability, reduces tire roll, and lowers the chance of pinch flats.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open\u003e\u003csummary\u003e\u003cstrong\u003eHow does a 29-inch carbon DH rim compare to alloy rims for durability?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eCompared to most alloy rims, this T700\/T800 carbon DH rim offers superior fatigue resistance, lateral stiffness, and higher impact strength due to advanced layup and manufacturing controls. While alloy rims can dent under extreme impacts, carbon maintains structure until failure but is less easily repaired.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open\u003e\u003csummary\u003e\u003cstrong\u003eWill a 28 spoke carbon MTB rim handle heavy riders on rough descents?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eWith a 28 spoke build and \u0026gt;300kg compressive strength, this rim is tested for up to 120kg rider weight on DH terrain. Consistent spoke tension is required for maximum performance.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open\u003e\u003csummary\u003e\u003cstrong\u003eIs this rim compatible with tubeless tires for downhill biking?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes, this rim is tubeless-ready and supports standard tubeless tape and valves. Use at least two wraps of 33mm tape for a secure seal with aggressive downhill tires.\u003c\/p\u003e\u003c\/details\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"29er Carbon MTB DH Rim – 40mm Outer \/ 32mm Inner Wide, 30mm high for Down hill | Bola\",\n  \"description\": \"Bola's 29er Carbon DH MTB Rim features a 40mm outer and 32mm inner width with a 30mm deep profile, optimized for aggressive downhill performance, heavy riders, and competitive endurance cycling. Designed and tested for high-strength and stability using T700\/T800 unidirectional carbon fiber, this rim supports tubeless tire systems and advanced spoke lacing for 29-inch mountain bikes. Key Features \u0026 Specifications Intended Use: Downhill MTB, enduro, gravity-focused riding Rim Size: 29\\\" (ISO 622mm) Material: T700\/T800 unidirectional carbon fiber with epoxy resin matrix Outer Width: 40mm \u0026nbsp;|\u0026nbsp; Inner Width: 32mm Profile Height: 30mm Weight: 620g (±15g per rim) Spoke Count: 28H ERD: 579mm Valve Hole: 6.5mm Presta (customizable) Tire Compatibility: Tubeless-ready, 2.0–2.6\\\" MTB tires Max Rider Weight: 120kg Strength \u0026 Precision Metric Value Forward Compressive Strength \u0026gt;300kg Spoke Hole Tension \u0026gt;280kg Lateral Torsion Resistance \u0026gt;50kg Dynamic Balance \u0026lt;3g Flatness Tolerance \u0026lt;0.15mm Roundness Tolerance \u0026lt;0.3mm Mounting \u0026 Use Cases 28-hole design fits standard J-bend and straight-pull spokes (4.5mm spoke hole) Wide 32mm inner width maximizes tire stability and traction for aggressive trail and downhill use compared to typical 25-30mm rims Tubeless-ready with hookless bead for lower pressures and improved puncture resistance Customizable spoke\/valve hole diameters available to fit team or OEM builds Branded Quality Trusted by cycling professionals and race teams in Europe and North America, Bola rims are rigorously tested according to ISO 4210-7 (impact and fatigue). Durable, sustainable, and quality-focused — engineered for reliability and high performance at accessible pricing. Compatibility Fits 29\\\" \/ 700c wheel systems Supports 2.0–2.6\\\" tubeless MTB tires Compatible with Presta valves only (Schrader requires alteration) Frequently Asked Questions Is a 29er carbon rim with 40mm width good for downhill mountain biking? Yes, the 40mm outer\/32mm inner width provides a wide tire bed ideal for downhill. It supports modern tire profiles for increased traction and control on steep or technical descents. What are the benefits of a 32mm inner wide rim for aggressive trail riding? A 32mm inner rim width allows larger-volume tires to seat with a rounder profile, which improves cornering stability, reduces tire roll, and lowers the chance of pinch flats. How does a 29-inch carbon DH rim compare to alloy rims for durability? Compared to most alloy rims, this T700\/T800 carbon DH rim offers superior fatigue resistance, lateral stiffness, and higher impact strength due to advanced layup and manufacturing controls. While alloy rims can dent under extreme impacts, carbon maintains structure until failure but is less easily repaired. Will a 28 spoke carbon MTB rim handle heavy riders on rough descents? With a 28 spoke build and \u003e300kg compressive strength, this rim is tested for up to 120kg rider weight on DH terrain. Consistent spoke tension is required for maximum performance. Is this rim compatible with tubeless tires for downhill biking? Yes, this rim is tubeless-ready and supports standard tubeless tape and valves. 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