700C 40mm Tubeless Carbon Road Gravel Rim 32mm outer 26mm | Bola

Take a modern approach to fast, comfortable road and gravel riding with the Bola 700C tubeless-ready carbon rim. Its 40mm profile and 32mm outer / 26mm inner width are optimised for contemporary 31–48mm 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 Road Rim - Designed for road and gravel wheel builds

Tubeless-ready sealing and a 26mm (hook or hookless) inner width accommodate recommended tyre sizes while enabling lower pressures for better vibration damping and confidence over light pavement.

Riding with these rims tends to feel composed: the wider tyre support reduces sidewall deformation and permits tyre pressures up 90 psi range while still improving comfort when using 31–48mm 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

• The lightest road rim in the lineup — built for climbers: At 360–440g, the 40mm is the lightest depth in the road range. The Extremelight tier at 360g minimises rotational weight for climbing, making this the go-to choice for mountain stages, hill repeats, and gran fondos with significant elevation.
• Better crosswind handling than any deeper rim: The 40mm depth is the most stable option in gusty conditions, giving riders confidence on exposed climbs, technical descents, and criteriums where deep-section rims become a liability.
• Still aero enough for mixed terrain: Unlike a pure climbing rim, the 40mm profile provides meaningful aerodynamic benefit on flat and rolling sections — so you don’t give up speed when the road flattens out.
• Weight tier options: Choose Normal (440±15g), Superlight (405±15g), Ultralight (380±10g), or Extreme Light (360±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 105kg and recommended tyre pressure up to 90 psi.
• 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 poor surfaces are advised toward Superlight or Normal options. The rim’s ERD is 558mm and standard spoke and assembly hole diameters are 4.5mm and 7.5mm respectively, each available to customise for specific builds.