Bola 650B Hookless Carbon MTB Rim — 27.5" Asymmetric XC, 25mm Internal

When the trail narrows and every gram and tire contact matters, this 27.5" hookless carbon rim is built to translate power into forward motion and confidence. Engineered for cross-country and aggressive trail riding, it supports modern 2.1–2.4" tubeless tires and balances low weight with structural durability for sustained race pace and extended off-road days. Riders who demand responsive acceleration and predictable handling will notice the refined footprint and asymmetric strength under load.

Bola 650B Hookless Carbon MTB Rim - Designed for cross-country and trail riding

The rim's combination of a 25 mm internal width and a U-shaped asymmetric profile produces a wider, more supportive tire contact patch that improves traction and allows safe, lower pressures for comfort and grip. The hookless tubeless profile reduces pinch-flat risk and simplifies tubeless setup, while Toray unidirectional and woven carbon fiber construction delivers stiffness and responsiveness that benefit both climbs and technical sections.

Why it fits your routine

• Optimized for XC and trail tires: 25 mm inner width supports 2.1–2.4" tires at typical pressures (45–65 psi) to balance grip and rolling efficiency.
• Lightweight options: Available in superlight (315 ± 10 g) or standard (380 ± 15 g) weights to match priorities between racing performance and durability.
• Asymmetric strength: Offset rim profile improves spoke angle and balances tension between drive and non-drive sides for increased lateral rigidity and longer wheel life.
• Hookless tubeless safety: Hookless rim bed designed to secure tubeless beads, reduce pinch flats, and enable consistent sealing when used with ETRTO-compliant tires.
• High-tension reliability: Tested to >280 kgf spoke tension and compatible with 28 or 32 spoke builds to suit stiffness and resilience preferences.
• Industry compliance: ETRTO 2023 and ISO 4210-7 certification provide verified rim/tire compatibility and safety guidance for tubeless setups.
• Valve and hub compatibility: Presta (French) tubeless valve compatible; designed for 27.5"/650B wheel systems and works with Boost and non-Boost hub standards when laced accordingly.
• Materials and warranty: Constructed from Toray unidirectional and woven carbon fiber and backed by a 3-year warranty, with OEM customization available for brands and teams.

Technical highlights include a 30 mm rim height, 30 mm outer width, U-shaped asymmetric profile, and spoke hole options of 28 or 32. The rim's verified specifications—weight variants, 25 mm internal width, hookless tubeless beds, and ETRTO/ISO certifications—make it a reliable platform for riders seeking a modern 27.5" performance wheel capable of handling race speeds and varied trail conditions.