Bola 700c Carbon Gravel Rim 40mm High — 30mm Outer Width — 325–395g — Hooked or Hookless Tubeless

Ride longer over mixed terrain with a rim built for gravel performance and versatility. The Bola 700c Carbon Gravel Rim pairs a 40mm aerodynamic profile with a 30mm outer width to stabilise wider gravel tyres and support confident cornering on loose surfaces. Choose from four weight tiers to prioritise durability or low mass depending on terrain and riding style.

Bola 700c Carbon Gravel Rim 40mm High - Designed for mixed-terrain gravel riding

The 40mm high V-shaped profile and 30mm outer width were engineered to optimise tyre support for 38c–50c gravel tyres, improving comfort and handling when you drop pressures to increase compliance. Available in hooked (24mm inner) and hookless (25mm inner) tubeless variants, the rims accommodate modern tubeless setups while remaining compatible with a wide range of tyre choices when using the hooked option.

On rough tracks the rim’s wider platform reduces sidewall pinch and enhances cornering confidence; on faster gravel sections the 40mm profile contributes aerodynamic stability. Weight tiers range from a robust 395g per rim to an extreme-light 325g per rim so riders can choose the balance of resilience and rotational weight that matches their intended terrain and load.

Why it fits your routine

• Optimised tyre pairing: 30mm outer / 24–25mm inner width supports 38c–50c tyres, producing a mounted tyre width roughly 2–3mm wider than the labelled tyre for improved traction.
• Multiple weight options: Choose Normal (395±15g), Superlight (365±10g), Ultralight (345±10g) or Extreme Light (325±10g) to match durability needs and rider weight.
• Hooked or hookless tubeless: Hooked 24mm inner width for broad tyre compatibility; hookless 25mm inner width for modern tubeless tyres with improved seal consistency. Note hookless requires ETRTO-compliant tyres and adheres to a lower maximum pressure guidance.
• Disc-brake specific: No rim brake surface — designed exclusively for disc brake builds.
• Tuning and customisation: ERD 579mm, valve hole 6.5mm, spoke hole 4.5mm and assembly hole 7.5mm are customisable; nipple angles and drilling patterns can be specified to match hub and spoke choices.
• Strength-tested: Forward compressive >300 kg, lateral torsion >50 kg, spoke hole tension >280 kg for reliable structural performance.
• Ride limits and safety: Rider weight limit ≤100 kg; flatness tolerance <0.15mm; roundness tolerance <0.3mm; dynamic balance <3g.
• Tire pressure guidance: Max tyre pressure up to 125 psi for hooked configurations; hookless builds should follow ETRTO guidance (example max 73 psi) and tyre manufacturer compatibility.
• Assembly notes: Tubeless setup requires rim tape and a compatible tubeless valve; the spoke bed is not sealed from the factory.
• Warranty: Three-year warranty against manufacturing defects under normal use conditions.

Known tradeoffs include the reduced durability margin of the extreme-light tier for heavier or aggressive-rock riders, and the capped tyre pressures that make these rims unsuitable for high-pressure road clincher applications; choose the weight tier and hook type that best match your tyre selection and expected terrain.