Bola 700c Carbon Road Rim 25mm Inner Width for Disc Brake, 40mm or 45mm Depth, 24 Spoke UV Profile

Ride-ready and engineered for speed: the Bola 700c carbon road rim brings aerodynamic depth, a modern 25mm inner profile and disc-brake compatibility to custom wheel builds and race setups. Choose 40mm for versatile endurance rides or 45mm when you prioritise aerodynamic gain on flatter courses. Its wide profile is optimized for 28–32mm tires to improve comfort and rolling efficiency without sacrificing responsiveness.

Bola 700c Carbon Road Rim 25mm Inner Width for Disc Brake, 40mm or 45mm Depth, 24 Spoke UV Profile - Designed for competitive and endurance road cycling

The rim’s construction balances low mass with structural strength across multiple weight grades from Standard to Extreme Light, letting builders match rim weight to rider weight and intended use. Disc-brake design removes braking-surface heat concerns and focuses layup and stiffness where it matters for modern drivetrains.

Why it fits your routine

• Optimized tyre support: 25mm inner width welcomes 28–32mm road tyres, increasing air volume for lower rolling resistance and improved ride comfort compared with narrower rims.
• Two depth choices: 40mm offers lower crosswind sensitivity for mixed-terrain and endurance use; 45mm improves aerodynamic efficiency for flat-road race efforts and time-trial segments.
• Disc-brake specific: No braking track—designed exclusively for disc brake drivetrains to eliminate rim-surface heat issues and allow targeted carbon layups.
• Weight grade options: Available in Standard (≈450g), Superlight (≈420g), Ultralight (≈395g) and Extreme Light (≈375g) per rim, enabling a tradeoff between durability and race-day performance.
• Structural performance: Forward compressive strength >300 kg, lateral torsion resistance >50 kg, spoke hole tension >280 kg, dynamic balance <3 g and tight flatness/roundness tolerances.
• Custom-build ready: Valve, spoke and assembly hole diameters plus nipple angles and spoke patterns are customizable for OEM or team-specified wheel builds.
• 24-spoke configuration: Reduces rotating mass for quicker acceleration but requires precision tensioning; riders over 100 kg should consider the Standard weight grade for increased longevity.

Technical specifics include ERD 549mm, 24H spoke count, valve hole diameter 6.5mm (customizable), spoke hole diameter 4.5mm (customizable), assembly hole diameter 7.5mm (customizable), front nipple direction 7°, rear nipple directions 5° & 7° (customizable), recommended tyre pressure 100–125 psi and maximum rider weight 120 kg. The 40mm variant lists an outer width of 34mm while the 45mm variant lists an outer width of 31mm, and both maintain the 25mm inner width to support modern tyre profiles. The rim is suited for competitive road racing, endurance cycling and premium custom wheelset builds.