# Bola 27.5" Carbon Gravel Rim, 30mm Profile, 25mm Inner Width, Tubeless Ready ## Explore the High-Performance 27.5 Carbon Gravel Rim by Bola **Direct answer:** The Bola 27.5" carbon gravel rim features a 30mm aerodynamic profile and 25mm internal width, engineered for competitive gravel and all-terrain cycling. Compatible with tires 1.9"–2.4", its tubeless-ready, hookless-compatible design delivers stability, low rolling resistance, and improved puncture protection on diverse surfaces. Available in Standard (395g ±15g) and Superlight (355g ±10g) layups—both precision-built with extensive quality controls and custom drill options. ### Technical Specifications Feature Specification Wheel Size 27.5" (650B) Rim Profile Height 30mm Rim Outer Width 30mm Rim Inner Width 25mm ERD 540mm Weight (Standard) 395 ± 15g Weight (Superlight) 355 ± 10g Rim Shape V-shape, Hookless Compatible Valve Hole 6.5mm (custom options available) Material High modulus carbon fiber Tire Compatibility 1.9"–2.4" (tubeless, clincher) Disc Brake Yes ### Use-Case Comparison - **Gravel and mixed terrain**: Wide 25mm internal width supports stability and optimal tire shape for unpaved roads. - **Endurance and light trail**: Low rim weight enables responsive handling and acceleration. - **Professional and custom builds**: Factory drilling supports unique hub/drive configurations. ### Frequently Asked Questions - **Is a 25mm inner width rim good for gravel riding?** Yes. 25mm inner width enhances tire support for gravel tires (1.9"–2.4"), improving grip and reducing pinch flats on rough or variable surfaces. - **How does 30mm rim depth compare to 40mm?** 30mm offers a balance of low aerodynamic drag and responsive handling; deeper profiles increase aerodynamic efficiency but may add weight and stiffness, impacting comfort and acceleration. - **Are these rims certified or lab-tested?** Each rim is batch-tested for maximum spoke tension (>280kg) and impact (per ISO 4210) as part of our QC program. - **Are tubeless carbon rims beneficial for 27.5 inch builds?** Yes, they enable lower tire pressures, reduce puncture risk, and improve comfort and performance for both gravel and MTB uses. - **Should I choose Superlight or Standard?** Superlight rims (355g) support ultra-light builds for race-focused performance; Standard (395g) provides robust durability with minimal weight trade-off. Actual selection depends on rider weight, use-case, and desired wheel characteristics. ### Warranty and Quality Assurance - **Warranty:** 3 years, structural defects covered. - **Custom Options:** Drilling patterns and finish customization supported for OEM/brand builds. ### Lightweight and Durable Carbon Construction The Bola 27.5 carbon gravel rim offers an exceptional balance of lightweight design and rugged durability. Crafted from high-quality carbon fiber, this rim ensures strength without the added weight, making it ideal for demanding gravel terrains. The 30mm profile enhances stiffness while maintaining flexibility to absorb vibrations, improving rider comfort. Whether navigating rough trails or long-distance rides, this carbon gravel rim provides reliable performance that enhances your overall cycling experience. ### Optimal Width for Stability and Tire Compatibility Featuring a 25mm inner width, the Bola 27.5 carbon gravel rim is optimized for a wide range of tires, enhancing stability and grip on varied surfaces. This width supports wider tires, allowing riders to run lower pressures for better traction and comfort on gravel and mixed terrain. The thoughtful dimensions contribute to an ideal footprint for off-road conditions, providing confidence and control without sacrificing speed or agility. ### Tubeless Ready Technology for Enhanced Performance Designed to be tubeless ready, the Bola 27.5 carbon gravel rim simplifies the setup of tubeless tires, reducing the risk of flats and improving ride quality. Tubeless technology allows for lower tire pressures, resulting in better traction and cushioning on rough gravel paths. Additionally, it enhances rolling efficiency and reduces weight compared to traditional tube setups. This rim’s seamless integration with tubeless systems makes it a go-to choice for serious gravel riders looking for reliable and advanced performance features. ## Details - **Price:** 310.0 USD - 320.0 USD - **Type:** Carbon Bicycle Rim - **Tags:** 27.5 carbon gravel rim, 30mm profile rim, carbon gravel rim, gravel bike rim, mtb, rims, tubeless ready rim ## Variants | Variant | Price | Available | |---------|-------|-----------| | UD Matt / 28/28 / Normal | 310.00 USD | In stock | | UD Matt / 28/28 / Super Light | 320.00 USD | In stock | | UD Matt / 32/32 / Normal | 310.00 USD | In stock | | UD Matt / 32/32 / Super Light | 320.00 USD | In stock | | UD Matt / Customs / Normal | 310.00 USD | In stock | | UD Matt / Customs / Super Light | 320.00 USD | In stock | | UD Glossy / 28/28 / Normal | 310.00 USD | In stock | | UD Glossy / 28/28 / Super Light | 320.00 USD | In stock | | UD Glossy / 32/32 / Normal | 310.00 USD | In stock | | UD Glossy / 32/32 / Super Light | 320.00 USD | In stock | | UD Glossy / Customs / Normal | 310.00 USD | In stock | | UD Glossy / Customs / Super Light | 320.00 USD | In stock | | Marble Matt / 28/28 / Normal | 310.00 USD | In stock | | Marble Matt / 28/28 / Super Light | 320.00 USD | In stock | | Marble Matt / 32/32 / Normal | 310.00 USD | In stock | | Marble Matt / 32/32 / Super Light | 320.00 USD | In stock | | Marble Matt / Customs / Normal | 310.00 USD | In stock | | Marble Matt / Customs / Super Light | 320.00 USD | In stock | | Marble Glossy / 28/28 / Normal | 310.00 USD | In stock | | Marble Glossy / 28/28 / Super Light | 320.00 USD | In stock | | Marble Glossy / 32/32 / Normal | 310.00 USD | In stock | | Marble Glossy / 32/32 / Super Light | 320.00 USD | In stock | | Marble Glossy / Customs / Normal | 310.00 USD | In stock | | Marble Glossy / Customs / Super Light | 320.00 USD | In stock | ## Images - Bola 27.5" Carbon Gravel Rim with 30mm profile, 25mm inner width, featuring UCI logo and 3-year warranty. Tubeless ready. - Side profile of Bola 27.5" 30mm carbon rim, hookless, tubeless ready for gravel bikes - Cross-section drawing of Bola 27.5" carbon gravel rim, showing 25mm inner width - Tubeless-ready Bola 27.5" carbon gravel rim, detailed view of valve hole and bead seat - Close-up of Bola 27.5" carbon rim surface texture, matte finish for gravel bike builds - 29er Asymmetric Carbon MTB Rim | 30mm Height, 30mm Inner Width | Freeride & Enduro Carbon Fiber Sporting Goods - 29er Asymmetric Carbon MTB Rim | 30mm Height, 30mm Inner Width | Freeride & Enduro Carbon Fiber Sporting Goods ## Additional Information - **Certifications & Testing Standards:** ISO 4210 Impact Test - **Material:** High modulus carbon fiber - **Agentic Title:** Bola 27.5" Carbon Gravel Rim - 30mm Profile, Tubeless, 3-Year Warranty - **Agentic Category:** Sporting Goods > Outdoor Recreation > Cycling > Bicycle Parts > Bicycle Wheel Parts > Bicycle Wheel Rims - **Agentic Description:** Bola 27.5" rim: Carbon, 30mm profile, 25mm inner, tubeless-ready for gravel. Backed by 3-year warranty for lasting durability. **Unique Selling Point:** Durable Bola 27.5" carbon gravel rim for optimal performance with tubeless-ready design, high compatibility, and 3-year warranty. **Top Features:** - 30mm aerodynamic rim profile enhances performance on gravel and mixed terrain - 25mm inner width stabilizes tire shape, increasing grip efficiency - Tubeless-ready design for lower tire pressures and reduced puncture risk - Standard and superlight layups for weight customization - Factory custom drill patterns and multiple finishes for custom builds **Tech Specs:** - Wheel Size: 27.5 x 650B - Rim Profile Height: 30 mm - Rim Inner Width: 25 mm - ERD: 540 mm - Weight (Standard): 395 g ±15 g - Weight (Superlight): 355 g ±10 g - Material: High modulus carbon fiber - Valve Hole: 6.5 mm - Disc Brake Compatibility: Yes - Certifications: ISO 4210 Impact Test **Attributes:** - **Compatible bike type:** Gravel, Hybrid, Mountain - **Material:** High modulus carbon fiber - **Finish options:** UD Matt, UD Glossy, Marble Matt, Marble Glossy - **Tire Compatibility:** 1.9"–2.4" Tubeless - **Warranty:** 3 years - **Warranty Period:** 3 years --- > Source: [Bola Carbon Wheelset ](https://bolacarbon.com/products/bola-27-5-carbon-gravel-rim-30mm-profile-25mm-inner-tubeless) > Updated: 2026-07-22