29er Carbon Mountain Bike Rim — 28mm Inner Width Hookless Tubeless Ready, 23mm Profile, 300–375g

Built for cross-country and light trail riders who want lower rotational weight and confident cornering, this 29er carbon rim balances race-focused performance with practical durability. Use it with ETRTO-certified tubeless tires in the 2.1–2.4" range to benefit from improved tire support, a rounder profile, and reduced pinch-flat risk.

Bola MTB34-C23-29 — Designed for 29" cross-country and trail riders

The Bola MTB34-C23-29 is a hookless, tubeless-ready carbon fiber rim engineered around the ISO 622mm (29er) standard. With a low 23mm profile and 28mm inner width, it is optimized to improve traction and handling on hardpack and loose terrain while shaving substantial weight relative to alloy rims.

The rim comes in three verified weight grades: Standard (375 ± 15g), Superlight (330 ± 10g), and Ultralight (300 ± 10g). Each layup trades impact tolerance for rotational weight savings, and the rim is rated for riders up to 100kg when built to specification.

Why it fits your routine

• Race-ready weight options: Choose Ultralight (300 ± 10g) for competitive XC, Superlight (330 ± 10g) for a balance of durability and weight savings, or Standard (375 ± 15g) for greater longevity on varied trails.
• Hookless tubeless performance: Hookless U-shaped bead allows a cleaner carbon layup and tubeless compatibility; designed for tubeless tires that meet ETRTO hookless standards.
• Optimized tire support: 28mm inner width recommended for 2.1–2.4" tires (53–61mm), promoting a rounder tire profile, improved cornering traction, and fewer pinch flats.
• Low-profile stability: 23mm rim height provides responsive steering and reduced windage for XC and endurance riding.
• Structural integrity: Forward compressive strength >300kg, lateral torsion resistance >50kg, spoke hole tension >280kg, flatness tolerance <0.15mm, and roundness tolerance <0.3mm ensure consistent performance under load.
• Customizable build options: Spoke hole diameter (standard 4.5mm), valve hole (6.5mm), assembly hole (7.5mm), and nipple direction (left 5° / right 7°) are configurable to suit wheelbuilders and hub choices.
• Pressure and tire compatibility: Hookless limit caps tire pressure at 45–65 psi; clincher tires with inner tubes are not recommended.
• Proven ERD and sizing: ERD 592mm and outer width 34mm provide predictable spoke length calculations and compatibility with common 29er components.

Known tradeoffs include the 65 psi hookless pressure ceiling and the requirement for ETRTO-compliant tubeless tires; riders needing higher pressures or using non-tubeless clincher setups should consider a hooked-bead rim. The rim's verified dynamic equilibrium (<3g) and precise manufacturing tolerances make it suitable for XC and light trail use within its specified rider weight and impact expectations.