Bola 700c 40mm Asymmetric Carbon Tubeless Rim, 28mm Outer Width (T700/T800)

Ride with purposeful efficiency on long road days or mixed-surface gravel routes using a rim engineered for stability, aerodynamics, and weight-conscious builds. The Bola 700c 40mm asymmetric carbon tubeless rim blends high-strength Toray carbon with a tubeless-ready profile so you can prioritize speed, comfort, and predictable handling in endurance and competitive settings.

Bola 700c 40mm Asymmetric Carbon Tubeless Rim - Designed for road and gravel performance

The asymmetric U-shape and 28mm outer width are tuned to equalize spoke tensions and improve lateral stiffness, delivering a planted feel under power and consistent wheel behavior across long miles. Tubeless-ready construction and ETRTO/ISO 622 compatibility allow lower pressures for added comfort and rolling efficiency without sacrificing puncture resistance when used with recommended 25–32mm tubeless tires.

Comfort and confidence come from construction and precision control: T700/T800 unidirectional carbon fiber provides high strength-to-weight characteristics while dynamic balance, flatness, and roundness tolerances (less than 3g, 0.15mm, and 0.3mm respectively) support smooth, durable wheel builds that retain performance over time.

Why it fits your routine

• Optimized material blend: Built from T700/T800 unidirectional carbon fiber for a balance of stiffness and resilience suitable for endurance riding and competitive applications.
• Asymmetric profile: Offsets flange positions to equalize left/right spoke tensions, improving lateral stiffness and wheel durability—particularly beneficial for disc brake setups and high-load conditions.
• Tubeless-ready versatility: Hookless or hooked bead options and ETRTO/ISO 622 compliance support tubeless setups for 25–32mm tires, enabling lower pressures for improved comfort and traction on varied surfaces.
• Multiple width and weight choices: 28mm outer width with 21mm or 23mm inner widths, and selectable weight options (350g Extreme-Light, 370g Ultra-Light, 390g Super-Light, 425g Standard) to match priorities from absolute weight savings to added robustness.
• Brake and hub compatibility: Designed to work with disc and rim brake configurations and compatible with standard road hub fittings; spoke holes sized at 4.5mm support common J-bend and straight-pull spoke types.
• Precision and quality control: Dynamic balance tested (<3g), flatness <0.15mm, roundness <0.3mm—measures that contribute to smoother rolls and reliable wheel builds.
• Load and service support: Rated for riders up to 100kg and backed by a 3-year warranty against manufacturing defects to support long-term ownership and workshop use.
• OEM and custom build ready: Suited for aftermarket wheel builds, OEM projects, workshops, and suppliers seeking an ISO-certified carbon rim with consistent manufacturing standards.

Key specifications include 700c (ISO 622) diameter, 40mm depth in an asymmetric U-shape, 28mm external width, inner width choices of 21mm or 23mm, tubeless-ready bead options (hooked or hookless), spoke hole diameter 4.5mm for standard hub fitment, recommended tubeless tire sizes 25–32mm, multiple weight versions from 350g to 425g, ISO/ETRTO compatibility, dynamic balance and geometric tolerances for consistent performance, and a 3-year warranty covering manufacturing defects.