700C 50mm Tubeless Carbon Gravel Rim 42mm outer 35mm Inner

Take a modern approach to fast, comfortable road and gravel riding with the Bola 700C tubeless-ready carbon rim. Its 50mm profile and 42mm outer / 35mm inner width are optimised for contemporary 38–56mm tyres, delivering aerodynamic gains while supporting lower tyre pressures for improved comfort and traction. Available in four weight tiers, the rim lets you prioritise durability or weight savings depending on your build and riding style.

Bola 700C Tubeless Carbon Gravel Rim - Designed for gravel wheel builds

Tubeless-ready sealing and a 35mm inner width accommodate recommended tyre sizes while enabling lower pressures for better vibration damping and confidence over rough pavement.

Riding with these rims tends to feel composed: the wider tyre support reduces sidewall deformation and permits tyre pressures up 70 psi range while still improving comfort when using 38–56mm tyres. Riders seeking a climbing advantage can choose lighter layups, while heavier riders or rough-road users can select more robust schemes.

Why it fits your routine

• Maximum aero for gravel racing: The 50mm depth is the deepest option in the gravel lineup, delivering the strongest aerodynamic advantage on fast gravel sections and mixed-surface events — while the 42mm outer / 35mm inner width keeps tyre volume high for traction and comfort on rough terrain.
• Wide tyre support for real-world gravel: The 35mm inner width is purpose-built for 38–56mm gravel tyres at lower pressures (up to 70 psi), reducing pinch flats, improving grip on loose surfaces, and absorbing trail chatter that narrower rims transmit directly to the rider.
• Tubeless-ready for gravel confidence: Sealed rim bed supports standard tubeless tape and valves; lower pressures unlock the full comfort and traction benefit of modern gravel tyres without the puncture risk of tubes.
• Weight tier options: Choose Normal (520±15g), Superlight (490±10g), Ultralight (455±10g), or Extreme Light (435±10g) to match durability needs or climbing priorities.
• Strength and tolerance data: Forward compressive strength >300kg, lateral torsion resistance >50kg, spoke hole tension >280kg; flatness <0.15mm, roundness <0.3mm, dynamic balance <3g.
• Ride-ready limits: Maximum rider weight 110kg and recommended tyre pressure up to 70 psi for gravel tyres.
• Customisation available: Spoke hole count, valve hole (6.5mm standard), assembly hole, and nipple direction are configurable for builder preference.

Weight trade-offs are explicit: lighter layups save 60–80g per rim versus the Normal scheme but reduce layup margin; riders over ~90kg or those regularly on technical terrain are advised toward Superlight or Normal options. The rim’s ERD is 548mm and standard spoke and assembly hole diameters are 4.5mm and 7.5mm respectively, each available to customise for specific builds.