Bola 700c 34mm Carbon Gravel Rim — 35mm & 40mm Depth, 24H Disc, 370–440g

Take a tailored approach to mixed-surface riding with a tubeless-ready carbon rim engineered for gravel racing, endurance rides, and custom wheel builds. The Bola 700c rim balances wide tire support and structural stiffness so you can run lower pressures for traction without losing durability. Choose between 35mm and 40mm profiles and multiple layups to match your weight, terrain, and performance priorities.

Bola 700c 34mm Carbon Gravel Rim - Designed for gravel racing and mixed-terrain endurance

The 34mm external / 25mm internal platform is engineered to stabilize modern gravel tire casings from 28mm up to 50mm, improving bead support and contact patch shape so you feel more confident on loose or variable surfaces. Available weights range from 370g to 440g per rim depending on layup, letting riders and wheelbuilders tune for lightness or impact margin.

Why it fits your routine

• Versatile tire fitment: 25mm internal width supports 28–50mm tires and tubeless setups for lower pressures and better traction on gravel and mixed-surface routes.
• Two profile depths: 35mm depth reduces crosswind sensitivity for technical or hilly courses, while 40mm depth adds aerodynamic benefit on open flats.
• Weight choices to match use: Select Standard (≈440g), Superlight (≈415g), Ultralight (≈390g), or Extreme Light (≈370g) to prioritize durability, endurance performance, or elite weight-saving targets.
• Disc brake specific: Purpose-built for disc brake systems to simplify build compatibility and brake performance under varied conditions.
• Precision tolerances: Flatness <0.15mm, roundness <0.3mm and dynamic balance <3g for consistent wheel building and predictable handling.
• High structural ratings: Forward compressive strength >300kg, lateral torsion resistance >50kg, and spoke hole tension tolerance >280kg for reliable use under load.
• Compact hub and build options: 24 spoke holes, ERD 559mm, 6.5mm valve hole standard (customizable) and 4.5mm spoke holes standard with customization available for OEM wheelbuilders.
• Customization for brands and builders: Options include spoke hole diameter, valve and assembly hole sizes, nipple angles for front/rear, and logo or finish choices for small and medium brands.

Use-case fit includes gravel racing where the 34mm platform supports wider tires at lower pressures for traction, endurance and bikepacking where the 35mm depth limits crosswind sensitivity while keeping stiffness for loaded bikes, and OEM/custom wheelset production with tailored hole sizes and branding options. Recommended layup selection depends on rider weight and terrain: Extreme Light is aimed at elite, lighter riders, while Superlight or Standard grades are suggested for heavier riders or very technical terrain to protect spoke tension and compressive strength.

Key dimensions and specifications: 700c (ISO 622mm BSD) diameter, 34mm external / 25mm internal width, 35mm or 40mm profile depths, ERD 559mm, 24H drilling, disc brake only, valve hole 6.5mm standard, spoke hole 4.5mm standard, assembly hole 7.5mm standard, nipple angles 5° & 7° configurable, and tire pressure range 100–125 psi.