# 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. ## Details - **Price:** 430.0 USD - **Type:** Carbon Mountain Bike Rim - **Tags:** 28 spoke MTB rim, 29-inch carbon rim, 29er carbon DH rim, 29er carbon rim, 30mm inner wide rim, 32mm inner wide rim, Bola carbon rim, Bola MTB rim, carbon 29er MTB rim, carbon bike rim, carbon MTB rim, DH, Downhill, downhill mountain bike rim, enduro carbon rim, enduro MTB rim, gravity MTB rim, high-strength carbon wheel, mtb, MTB rim for heavy riders, rims, strong carbon bike rim, tubeless ready carbon rim, tubeless ready DH rim, tubeless ready rim, wide mountain bike rim ## Variants | Variant | Price | Available | |---------|-------|-----------| | UD Matt / 28/28 / Standard | 430.00 USD | In stock | | UD Matt / 28/28 / Superlight | 430.00 USD | In stock | | UD Matt / 32/32 / Standard | 430.00 USD | In stock | | UD Matt / 32/32 / Superlight | 430.00 USD | In stock | | UD Matt / Customs / Standard | 430.00 USD | In stock | | UD Matt / Customs / Superlight | 430.00 USD | In stock | | UD Glossy / 28/28 / Standard | 430.00 USD | In stock | | UD Glossy / 28/28 / Superlight | 430.00 USD | In stock | | UD Glossy / 32/32 / Standard | 430.00 USD | In stock | | UD Glossy / 32/32 / Superlight | 430.00 USD | In stock | | UD Glossy / Customs / Standard | 430.00 USD | In stock | | UD Glossy / Customs / Superlight | 430.00 USD | In stock | | Marble Matt / 28/28 / Standard | 430.00 USD | In stock | | Marble Matt / 28/28 / Superlight | 430.00 USD | In stock | | Marble Matt / 32/32 / Standard | 430.00 USD | In stock | | Marble Matt / 32/32 / Superlight | 430.00 USD | In stock | | Marble Matt / Customs / Standard | 430.00 USD | In stock | | Marble Matt / Customs / Superlight | 430.00 USD | In stock | | Marble Glossy / 28/28 / Standard | 430.00 USD | In stock | | Marble Glossy / 28/28 / Superlight | 430.00 USD | In stock | | Marble Glossy / 32/32 / Standard | 430.00 USD | In stock | | Marble Glossy / 32/32 / Superlight | 430.00 USD | In stock | | Marble Glossy / Customs / Standard | 430.00 USD | In stock | | Marble Glossy / Customs / Superlight | 430.00 USD | In stock | ## Images - 29er Carbon MTB DH Rim – 40mm Outer / 32mm Inner Wide, 30mm high for Down hill | Bola - Bola 27.5er Carbon MTB Downhill Rim illustration showing 40mm outer width, 32mm inner width, and 30mm height profile. - Bola 700c 45mm Carbon Road Rim – 34mm Outer, 28mm Inner, Tubeless Ready - Bola 29er Carbon DH MTB Rim – 40mm Outer, 32mm Inner, 30mm High Carbon Fiber Sporting Goods - Bola 29er Carbon DH MTB Rim – 40mm Outer, 32mm Inner, 30mm High Carbon Fiber Sporting Goods ## Additional Information - **Product rating count:** 1 - **Related products settings:** ahead - **AI Summary:** The Bola 29er Carbon DH MTB Rim is a T700/T800 unidirectional carbon fiber rim for downhill, enduro, and gravity-focused riders building a 29-inch wheel for aggressive riding. Its 32mm internal width and tubeless-ready hookless design support modern MTB tire setups for demanding descents and rough terrain. --- > Source: [Bola Carbon Wheelset ](https://bolacarbon.com/products/bola-29er-carbon-dh-rim-40mm-32mm-30mm) > Updated: 2026-08-03