Bola 29er Carbon Downhill MTB Rim, 40mm Outer / 32mm Inner, 30mm High, Tubeless-Ready

When the trail turns technical and speeds climb, these rims give you the platform to push harder with confidence. Built for aggressive downhill and gravity-focused enduro, the Bola 29er carbon rim balances impact strength, lateral stiffness, and a wide tire bed so modern 2.0–2.6" MTB tires perform at their best.

Bola 29er Carbon Downhill MTB Rim - Designed for downhill and gravity riding

The 40mm outer / 32mm inner width and 30mm profile create a stable, predictable tire shape that improves cornering and traction on steep, rocky lines. Constructed from T700/T800 unidirectional carbon fiber with an epoxy matrix, the rim is optimized for strength-to-weight performance and consistent manufacturing tolerances.

Why it fits your routine

• Downhill and enduro-ready dimensions: 29" (ISO 622mm) rim with a wide 32mm inner width to support larger-volume tires for better traction and reduced tire roll.
• High-strength carbon layup: T700/T800 uni-directional carbon fiber provides superior fatigue resistance and lateral stiffness compared with typical alloy rims.
• Tubeless-ready with hookless bead: Compatible with tubeless systems and recommended for 2.0–2.6" MTB tires to run lower pressures and improve puncture resistance.
• Precision tolerances: Dynamic balance <3g, flatness tolerance <0.15mm and roundness tolerance <0.3mm for predictable wheel building and consistent ride feel.
• Purpose-built strength: Forward compressive strength >300kg and spoke hole tension >280kg support heavy impacts and high-tension builds for riders up to 120kg when properly built.
• Wheel build ready: 28H drilling, ERD 579mm, 6.5mm Presta valve hole (customizable) to fit standard J-bend or straight-pull spokes and common hub standards.
• Controlled weight: Nominal rim weight 620g (±15g) offering a balance between durability and rotational mass for gravity-oriented riding.
• Compatibility: Fits 29"/700c systems; Schrader valves require alteration; supports standard tubeless tape and valves with recommended tape application for secure sealing.

Engineered and tested to ISO 4210-7 impact and fatigue standards and trusted by race teams, these rims prioritize structural reliability and predictable behavior under load, making them suitable for competitive and recreational downhill riders who demand a robust, high-performance wheel platform.