{"product_id":"bola-27-5-carbon-gravel-rim-30mm-profile-25mm-inner-tubeless","title":"Bola 27.5\" Carbon Gravel Rim, 30mm Profile, 25mm Inner Width, Tubeless Ready","description":"\u003ch2\u003eBola 27.5\" Carbon Gravel Rim – 30mm Profile, 25mm Inner Width, Tubeless Ready\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDirect answer:\u003c\/strong\u003e 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.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Size\u003c\/td\u003e\n\u003ctd\u003e27.5\" (650B)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Profile Height\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Outer Width\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Inner Width\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eERD\u003c\/td\u003e\n\u003ctd\u003e540mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (Standard)\u003c\/td\u003e\n\u003ctd\u003e395 ± 15g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (Superlight)\u003c\/td\u003e\n\u003ctd\u003e355 ± 10g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Shape\u003c\/td\u003e\n\u003ctd\u003eV-shape, Hookless Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Hole\u003c\/td\u003e\n\u003ctd\u003e6.5mm (custom options available)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh modulus carbon fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTire Compatibility\u003c\/td\u003e\n\u003ctd\u003e1.9\"–2.4\" (tubeless, clincher)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisc Brake\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eUse-Case Comparison\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGravel and mixed terrain\u003c\/strong\u003e: Wide 25mm internal width supports stability and optimal tire shape for unpaved roads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEndurance and light trail\u003c\/strong\u003e: Low rim weight enables responsive handling and acceleration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional and custom builds\u003c\/strong\u003e: Factory drilling supports unique hub\/drive configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs a 25mm inner width rim good for gravel riding?\u003c\/strong\u003e\u003cbr\u003eYes. 25mm inner width enhances tire support for gravel tires (1.9\"–2.4\"), improving grip and reducing pinch flats on rough or variable surfaces. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow does 30mm rim depth compare to 40mm?\u003c\/strong\u003e\u003cbr\u003e30mm 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAre these rims certified or lab-tested?\u003c\/strong\u003e\u003cbr\u003eEach rim is batch-tested for maximum spoke tension (\u0026gt;280kg) and impact (per ISO 4210) as part of our QC program.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAre tubeless carbon rims beneficial for 27.5 inch builds?\u003c\/strong\u003e\u003cbr\u003eYes, they enable lower tire pressures, reduce puncture risk, and improve comfort and performance for both gravel and MTB uses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShould I choose Superlight or Standard?\u003c\/strong\u003e\u003cbr\u003eSuperlight 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.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and Quality Assurance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 3 years, structural defects covered.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom Options:\u003c\/strong\u003e Drilling patterns and finish customization supported for OEM\/brand builds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Bola 27.5\\\" Carbon Gravel Rim – 30mm Profile, 25mm Inner Width, Tubeless Ready\",\n  \"description\": \"Bola 27.5\\\" Carbon Gravel Rim – 30mm Profile, 25mm Inner Width, Tubeless Ready 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 (\u003e280kg) 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. 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