Bola 700c 40mm Carbon Road Rim — 23mm Inner, 30mm or 34mm Outer, Tubeless-Ready, Disc Brake

Designed for racers, endurance riders and OEM wheel builders, the Bola 700c 40mm carbon rim balances low weight, aerodynamic profile and practical compatibility. Choose 30mm or 34mm outer width with a 23mm inner bed to run 25–32mm tires tubeless-ready, and pair the rim with disc brake wheel builds for modern road and gravel setups. Available in three verified weight grades, the rim supports competitive use as well as high-mileage training and team OEM programs.

Bola 700c 40mm Carbon Road Rim - Designed for competitive road and endurance use

On a fast group ride or a long gran fondo, these rims deliver predictable handling and aerodynamic gain without sacrificing tire volume. The 40mm profile and U/UV hookless-compatible shape were developed to reduce turbulent flow at the tire shoulder when matched to wider road tires, while the UV-cured resin finish protects the layup and maintains consistent surface quality.

Why it fits your routine

• Purpose-built widths: 30mm outer for lower rotational weight with narrower tires, 34mm outer to improve aero benefits with 28–32mm tires, both with a 23mm inner width for optimal tire support.
• Three weight grades: Standard (430 ±15g) for training and OEM builds, Superlight (400 ±10g) for endurance and gran fondo, Ultralight (380 ±10g) for climbing-focused race builds.
• Tubeless-ready: U/UV rim profile and 23mm internal width support tubeless setups when used with appropriate rim tape (recommended 25mm) and valves; valve hole default is 6.5mm and customizable.
• Structural validation: Forward compressive strength >300 kg, lateral torsion resistance >50 kg, spoke hole tension >280 kg with dynamic equilibrium <3g for consistent balance and build quality.
• Precision tolerances: Flatness <0.15mm and roundness <0.3mm to ensure predictable wheel truing and consistent spoke tension behavior.
• Pressure and weight limits: Recommended tire pressure 100–125 psi and rider weight limit ≤120 kg; ultralight grade advised for riders under 85 kg on smooth roads.
• Disc brake only: No machined brake track—designed specifically for modern disc-brake wheel systems and compatible with all standard road groupsets at the wheel build stage.
• Customization and OEM options: Spoke count, valve and assembly hole diameters, nipple angles (front 7°, rear 5° or 7°) and private-label branding available per order, plus a three-year warranty on all grades.

Both outer width options share the same 23mm inner width and 40mm profile, so wheel stiffness and spoke tension behavior remain comparable across configurations and are suitable for building reliable, race-capable disc wheels.