{"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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