# Bola 650B Asymmetric Carbon Gravel Rim, 30mm Deep, 24/25mm Inner, Tubeless, 330–395g When your ride mixes fast gravel sections, rough singletrack and long-distance efforts, wheel choice changes how the bike feels and performs. The Bola 650B asymmetric carbon gravel rim is built for riders and builders who want a lightweight, tubeless-ready foundation that balances acceleration, tire support and rim strength across varied terrain. ## Bola 650B Asymmetric Carbon Gravel Rim - Designed for lightweight, high-performance 650B builds It fits competitive and endurance gravel use with a 30mm depth and 24mm or 25mm inner width options that stabilize 38c–50c tires. Available in hooked or hookless bead shapes and produced with an asymmetric U-shaped profile, the rim is optimized for disc brake systems and tubeless setups. The design focus is on ride quality under mixed conditions: a shallow 30mm rim depth keeps rotational weight low for snappy acceleration while the asymmetric layout improves spoke tension balance for greater wheel durability on rough surfaces. ### Why it fits your routine - **Purpose-built 650B sizing:** Designed for 27.5" wheels to match modern gravel geometry and tire choices. - **Optimized width options:** 24mm or 25mm inner width supports a wide tire range (38c–50c) to balance comfort, traction and rolling resistance. - **Lightweight options:** Choice of Ultralight (330g), Superlight (355g) or Normal (395g) per rim to tailor weight versus durability for racing or endurance riding. - **Asymmetric U-shaped profile:** Improves spoke tension distribution and wheel robustness where off-road impacts are common. - **Tubeless ready, hooked or hookless:** Compatible with modern tubeless tires; choose hooked for broader tire compatibility or hookless for lower-pressure setups when compatible with your tires. - **Disc brake only:** Built specifically for disc-equipped gravel bikes to concentrate material and stiffness where it matters. - **Certified and warranted:** Exceeds EN 14766 and ISO 4210-7 standards for impact and fatigue and includes a 3-year warranty. - **Effective Rim Diameter (ERD):** 540mm for predictable spoke length calculation in custom builds. - **30mm outer width and 30mm depth:** A shallow, stable profile that reduces aerodynamic penalties while maintaining tire support on rough terrain. Suitable for custom wheel builders, small brand OEMs or riders updating wheels for mixed-surface racing and endurance gravel events, the Bola 650B rim provides a focused balance of low rotating mass, compatible tire range and structural design features that prioritize real-world durability and tubeless performance. ## Details - **Price:** 310.0 USD - 320.0 USD - **Type:** Carbon Gravel Bicycle Rim - **Tags:** 24mm inner width carbon rim, 25mm inner width carbon rim, 650B carbon gravel rim, asymmetric carbon rim, carbon bike rim, disc brake carbon rim, gravel bike rim upgrade, hooked carbon rim, hookless carbon rim, lightweight gravel rim, mtb, rims, tubeless ready rim ## Variants | Variant | Price | Available | |---------|-------|-----------| | UD Matt / 28/28 / Normal | 310.00 USD | In stock | | UD Matt / 28/28 / Super Light | 320.00 USD | In stock | | UD Matt / 32/32 / Normal | 310.00 USD | In stock | | UD Matt / 32/32 / Super Light | 320.00 USD | In stock | | UD Matt / Customs / Normal | 310.00 USD | In stock | | UD Matt / Customs / Super Light | 320.00 USD | In stock | | UD Glossy / 28/28 / Normal | 310.00 USD | In stock | | UD Glossy / 28/28 / Super Light | 320.00 USD | In stock | | UD Glossy / 32/32 / Normal | 310.00 USD | In stock | | UD Glossy / 32/32 / Super Light | 320.00 USD | In stock | | UD Glossy / Customs / Normal | 310.00 USD | In stock | | UD Glossy / Customs / Super Light | 320.00 USD | In stock | | Marble Matt / 28/28 / Normal | 310.00 USD | In stock | | Marble Matt / 28/28 / Super Light | 320.00 USD | In stock | | Marble Matt / 32/32 / Normal | 310.00 USD | In stock | | Marble Matt / 32/32 / Super Light | 320.00 USD | In stock | | Marble Matt / Customs / Normal | 310.00 USD | In stock | | Marble Matt / Customs / Super Light | 320.00 USD | In stock | | Marble Glossy / 28/28 / Normal | 310.00 USD | In stock | | Marble Glossy / 28/28 / Super Light | 320.00 USD | In stock | | Marble Glossy / 32/32 / Normal | 310.00 USD | In stock | | Marble Glossy / 32/32 / Super Light | 320.00 USD | In stock | | Marble Glossy / Customs / Normal | 310.00 USD | In stock | | Marble Glossy / Customs / Super Light | 320.00 USD | In stock | ## Images - 27.5" Superlight Carbon MTB Rim set, 34mm inner width, 30mm height, designed for XC and trail use, featuring UCI logo and war - Cross-section diagram of Bola 650B carbon rim with asymmetric U-shape, inner width options labeled - Detail image of Bola carbon gravel rim bead seat showing hookless and hooked designs side by side - Tubeless-ready setup demonstration on Bola 650B carbon rim, compatible with 38c–50c gravel tires - Close-up of matte carbon fiber texture on Bola 650B asymmetric gravel rim for disc brakes - Bola 650B Asymmetric Carbon Gravel Rim, 30mm Deep, 24/25mm Inner, Tubeless, 330–395g Carbon Fiber Sporting Goods - Bola 650B Asymmetric Carbon Gravel Rim, 30mm Deep, 24/25mm Inner, Tubeless, 330–395g Carbon Fiber Sporting Goods --- > Source: [Bola Carbon Wheelset ](https://bolacarbon.com/products/bola-650b-carbon-gravel-rim) > Updated: 2026-08-03