{"product_id":"650b-hookless-carbon-mtb-rim-25mm-inner-asymmetric-xc","title":"650B Hookless Carbon MTB Rim, 27.5\" Asymmetric XC, 25mm Internal","description":"\u003ch2 id=\"tinymce_scroll_sign\"\u003e27.5 Hookless Carbon MTB Rim: Lightweight, Strong, and Reliable\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSummary:\u003c\/strong\u003e Precision-engineered for cross-country and aggressive trail riding, the Bola 650B (27.5\") hookless carbon MTB rim weighs 315±10g (superlight) or 380±15g (standard), supports 2.1–2.4\" tubeless tires, and features a modern 25mm inner width. Fully ETRTO compliant for tire\/rim safety and tested to \u0026gt;280kgf spoke tension. 3-year warranty and OEM customization available for brands and teams.\u003c\/p\u003e\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e650B \/ 27.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRim Height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInner Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOuter Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e315 ± 10g (superlight); 380 ± 15g (standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProfile\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eU-shaped, Asymmetric (offset)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTubeless Presta (French) valve compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpoke Holes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e28\/32 available, \u0026gt;280kgf tension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eToray unidirectional and woven carbon fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eETRTO 2023, ISO 4210-7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eXC \u0026amp; Trail Performance, Verified Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e25mm inner width excels with 2.1–2.4\" XC and trail tires, supporting 45–65psi, aligning with modern tire standards.\u003c\/li\u003e\n\u003cli\u003eAsymmetric offset design improves spoke angle to balance tension, increasing lateral rigidity and durability for racing and all-mountain use.\u003c\/li\u003e\n\u003cli\u003eHookless tubeless profile reduces pinch flats, supports lower tire pressure, and ensures secure tire fit.\u003c\/li\u003e\n\u003cli\u003eMeets ETRTO and ISO industry standards for rim\/tire safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eComparison Table: 650B Carbon MTB Rims\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003eBola 650B\u003c\/th\u003e\n\u003cth\u003eUltra XC Comp\u003c\/th\u003e\n\u003cth\u003eOEM 650B Pro\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (g)\u003c\/td\u003e\n\u003ctd\u003e315 \/ 380\u003c\/td\u003e\n\u003ctd\u003e370\u003c\/td\u003e\n\u003ctd\u003e400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Width (mm)\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAsymmetric\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Height (mm)\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e28\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTubeless Hookless\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\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\u003e2 years\u003c\/td\u003e\n\u003ctd\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Is a 25mm inner width rim suitable for modern XC and trail tires?\u003c\/strong\u003e \u003cbr\u003eA: Yes, 25mm inner width accommodates 2.1–2.4\" tires, optimizing contact patch and support at lower pressures for cross-country and aggressive trail use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Are hookless rims safe for aggressive riding?\u003c\/strong\u003e \u003cbr\u003eA: This rim is ETRTO certified, designed for 45–65psi, and tested to \u0026gt;280kgf spoke tension for reliable tubeless performance in racing and trail environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the main advantage of an asymmetric (offset) rim in MTB?\u003c\/strong\u003e \u003cbr\u003eA: Offset increases spoke tension balance between drive\/non-drive sides, improving wheel stiffness and longevity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What tire and hub standards are compatible?\u003c\/strong\u003e \u003cbr\u003eA: Compatible with 27.5\"\/650B wheels, ETRTO-compliant tubeless tires (2.1–2.4\"), and Boost\/non-Boost hubs supporting 28–32 spokes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: How does the rim compare with other ultralight 650B options?\u003c\/strong\u003e \u003cbr\u003eA: The Bola rim offers lower verified weight, ETRTO\/ISO compliance, asymmetric design, and OEM customization for brand-focused buyers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eInnovative Hookless Carbon Design for Enhanced Performance\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe 27.5 hookless carbon MTB rim incorporates a cutting-edge hookless rim design that significantly improves strength and reduces weight compared to traditional hooked rims. This design allows for better tire compatibility, enabling riders to run lower tire pressures without compromising durability. The carbon fiber construction ensures excellent responsiveness and stiffness, making it perfect for cross-country (XC) riders seeking speed and control on various terrains. Its hookless nature also simplifies tubeless tire setup, resulting in fewer flats and enhanced trail confidence.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eAsymmetric Rim Profile for Balanced Strength and Stability\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThis 27.5 hookless carbon MTB rim features an asymmetric shape, which optimizes spoke tension on both sides of the wheel. This balance enhances wheel durability and reduces the likelihood of spoke breakage or rim deformation under stress. The 25mm internal width offers a wider tire footprint that improves traction and comfort while maintaining aerodynamic efficiency essential for XC riding. Together, these attributes provide riders with a reliable, responsive rim that performs well in demanding mountain bike conditions.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eLightweight Construction with 25mm Internal Width for Versatile XC Use\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWith a 25mm internal width, this 27.5 hookless carbon MTB rim strikes the perfect balance between lightweight agility and tire volume capacity. Weight savings from the carbon fiber design improve acceleration and climbing efficiency, while the rim width supports wider tires for enhanced grip and shock absorption. This rim is ideal for trail and cross-country cyclists who prioritize speed and stability without sacrificing durability. Its compatibility with a wide range of tires ensures versatility for diverse riding styles and trail challenges.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Carbon Fiber Sporting Goods","offers":[{"title":"UD Matt \/ 28\/28 \/ Normal","offer_id":48092926640382,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ 28\/28 \/ Super Light","offer_id":48092926673150,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ 32\/32 \/ Normal","offer_id":48092926705918,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ 32\/32 \/ Super Light","offer_id":48092926738686,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ Customs \/ Normal","offer_id":48092926771454,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ Customs \/ Super Light","offer_id":48092926804222,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ 28\/28 \/ Normal","offer_id":48092926836990,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ 28\/28 \/ Super Light","offer_id":48092926869758,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ 32\/32 \/ Normal","offer_id":48092926902526,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ 32\/32 \/ Super Light","offer_id":48092926935294,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ Customs \/ Normal","offer_id":48092926968062,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ Customs \/ Super Light","offer_id":48092927000830,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ 28\/28 \/ Normal","offer_id":48092927033598,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ 28\/28 \/ Super Light","offer_id":48092927066366,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ 32\/32 \/ Normal","offer_id":48092927099134,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ 32\/32 \/ Super Light","offer_id":48092927131902,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ Customs \/ Normal","offer_id":48092927164670,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ Customs \/ Super Light","offer_id":48092927197438,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ 28\/28 \/ Normal","offer_id":48092927230206,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ 28\/28 \/ Super Light","offer_id":48092927262974,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ 32\/32 \/ Normal","offer_id":48092927295742,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ 32\/32 \/ Super Light","offer_id":48092927328510,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ Customs \/ Normal","offer_id":48092927361278,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ Customs \/ Super Light","offer_id":48092927394046,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/mtb_rims.png?v=1780298344","url":"https:\/\/bolacarbon.com\/products\/650b-hookless-carbon-mtb-rim-25mm-inner-asymmetric-xc","provider":"Bola Carbon Wheelset ","version":"1.0","type":"link"}