{"product_id":"700c-34mm-wide-carbon-gravel-bike-rim-35mm-40mm-depth-24h-disc-brake-370-440g-bola","title":"700c 34mm Wide Carbon Gravel Bike Rim | 35mm \u0026 40mm Depth | 24H Disc Brake | 370–440g | Bola","description":"\u003ch2\u003e700c 34mm Carbon Gravel Rim — 24-Hole Disc Brake, 370–440g\u003c\/h2\u003e\u003cp\u003eThe Bola 700c carbon gravel rim is a tubeless-ready, disc-brake-specific rim built for gravel racing, mixed-terrain endurance, and custom wheelset builds. Available in 35mm and 40mm profile depths with a 34mm external \/ 25mm internal width, it accommodates tire widths from 28mm to 50mm and accepts pressures between 100 and 125 psi. Weight ranges from 440g (standard) to 370g (extreme light) depending on selected layup — enabling builders to balance durability against weight targets without changing rim geometry.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Diameter\u003c\/td\u003e\n\u003ctd\u003e700c (ISO 622mm BSD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile Depth\u003c\/td\u003e\n\u003ctd\u003e35mm or 40mm (UV wave shape)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Width\u003c\/td\u003e\n\u003ctd\u003e34mm (35mm profile) \/ 31mm (40mm profile)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal 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\u003e559mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Count\u003c\/td\u003e\n\u003ctd\u003e24 holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrake Type\u003c\/td\u003e\n\u003ctd\u003eDisc brake only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Hole\u003c\/td\u003e\n\u003ctd\u003e6.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Hole\u003c\/td\u003e\n\u003ctd\u003e4.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly Hole\u003c\/td\u003e\n\u003ctd\u003e7.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNipple Angle (Front)\u003c\/td\u003e\n\u003ctd\u003e7°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNipple Angle (Rear)\u003c\/td\u003e\n\u003ctd\u003e5° \u0026amp; 7° (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTire Pressure Range\u003c\/td\u003e\n\u003ctd\u003e100–125 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Rider Weight\u003c\/td\u003e\n\u003ctd\u003e120 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlatness Tolerance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoundness Tolerance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDynamic Balance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;3g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWeight Variants\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eGrade\u003c\/th\u003e\n\u003cth\u003eWeight per Rim\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003e440 ± 15g\u003c\/td\u003e\n\u003ctd\u003eTraining builds, heavier riders (up to 120kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuperlight\u003c\/td\u003e\n\u003ctd\u003e415 ± 10g\u003c\/td\u003e\n\u003ctd\u003eEndurance gravel racing, mixed terrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUltralight\u003c\/td\u003e\n\u003ctd\u003e390 ± 10g\u003c\/td\u003e\n\u003ctd\u003eCompetitive gravel racing, weight-optimized builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtreme Light\u003c\/td\u003e\n\u003ctd\u003e370 ± 10g\u003c\/td\u003e\n\u003ctd\u003eElite racing; best paired with riders under 75kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eTrade-off Note\u003c\/h3\u003e\u003cp\u003eThe Extreme Light (370g) layup prioritizes weight reduction over impact margin. For riders over 90kg or on highly technical, rock-strewn terrain, the Superlight (415g) or Standard (440g) grade is recommended to maintain spoke tension integrity over \u0026gt;280kg and forward compressive strength \u0026gt;300kg.\u003c\/p\u003e\u003ch2\u003eStructural Performance Data\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eForward Compressive Strength:\u003c\/strong\u003e \u0026gt;300kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLateral Torsion Resistance:\u003c\/strong\u003e \u0026gt;50kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpoke Hole Tension Tolerance:\u003c\/strong\u003e \u0026gt;280kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Equilibrium:\u003c\/strong\u003e \u0026lt;3g imbalance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlatness:\u003c\/strong\u003e \u0026lt;0.15mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoundness:\u003c\/strong\u003e \u0026lt;0.3mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eUse-Case Fit\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGravel Racing (mixed surface):\u003c\/strong\u003e 34mm internal width supports 40–50mm tires at lower pressures for traction; 40mm depth adds aero efficiency on open road sections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEndurance \/ Bikepacking:\u003c\/strong\u003e 35mm depth lowers crosswind sensitivity while retaining structural stiffness for loaded builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom Wheelset Builds (OEM\/Brand):\u003c\/strong\u003e Customizable spoke hole diameter (4.5mm std), nipple angles, valve hole size, and branding options make this rim suitable for small and medium cycling brands sourcing OEM-ready components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTubeless Setup:\u003c\/strong\u003e 25mm inner width and tubeless-compatible bead profile support tubeless conversion with standard tape and valves.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCustomization Options\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpoke hole diameter: 4.5mm standard or custom\u003c\/li\u003e\n\u003cli\u003eValve hole diameter: 6.5mm standard or custom\u003c\/li\u003e\n\u003cli\u003eAssembly hole diameter: 7.5mm standard or custom\u003c\/li\u003e\n\u003cli\u003eNipple angle: customizable per front\/rear application\u003c\/li\u003e\n\u003cli\u003eLogo, color finish, and decal options available for brand partners\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eIs a 34mm wide carbon rim too wide for gravel riding?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. A 34mm external \/ 25mm internal width is within the optimal range for gravel-specific tire fitment (38–50mm tires). It provides a supportive bead base that improves tire casing shape, lowers rolling resistance, and allows lower inflation pressures for better traction on loose surfaces.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the difference between the 35mm and 40mm depth options?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe 35mm profile is shallower, reducing crosswind sensitivity and weight — better suited for technical or mountainous gravel routes. The 40mm profile provides modest aerodynamic gain on flat or open sections. Both share the same 34mm\/25mm width and structural tolerances.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eHow light can a carbon gravel rim be without sacrificing durability?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eAt 390g (Ultralight) and 370g (Extreme Light), both grades maintain spoke hole tension tolerance \u0026gt;280kg and forward compressive strength \u0026gt;300kg. The Extreme Light grade is best suited for riders under 75–80kg on non-technical terrain. The Ultralight (390g) is the recommended balance point for most competitive applications.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eIs this rim compatible with tubeless tires?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The rim features a tubeless-compatible bead profile with a 25mm internal width. Standard tubeless rim tape and valves (6.5mm valve hole) are required; these are not included.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat spoke count and hole pattern does this rim use?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThis rim uses a 24-hole pattern, suitable for building lightweight disc brake gravel wheelsets with standard J-bend or straight-pull spokes. Custom hole counts may be available — contact us for OEM enquiries.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the warranty and quality assurance policy?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eAll rims are backed by a three-year warranty. Each unit is manufactured to flatness \u0026lt;0.15mm and roundness \u0026lt;0.3mm tolerances, with dynamic balance verified at \u0026lt;3g per rim.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"700c 34mm wide carbon gravel bike rim with 35mm and 40mm wave 24 spoke disc brake,superlight and ultralight even exteme light,Bola\",\n  \"description\": \"700c 34mm Carbon Gravel Rim — 24-Hole Disc Brake, 370–440g The Bola 700c carbon gravel rim is a tubeless-ready, disc-brake-specific rim built for gravel racing, mixed-terrain endurance, and custom wheelset builds. Available in 35mm and 40mm profile depths with a 34mm external \/ 25mm internal width, it accommodates tire widths from 28mm to 50mm and accepts pressures between 100 and 125 psi. Weight ranges from 440g (standard) to 370g (extreme light) depending on selected layup — enabling builders to balance durability against weight targets without changing rim geometry. Key Specifications Parameter Specification Rim Diameter 700c (ISO 622mm BSD) Profile Depth 35mm or 40mm (UV wave shape) External Width 34mm (35mm profile) \/ 31mm (40mm profile) Internal Width 25mm ERD 559mm Spoke Count 24 holes Brake Type Disc brake only Valve Hole 6.5mm (customizable) Spoke Hole 4.5mm (customizable) Assembly Hole 7.5mm (customizable) Nipple Angle (Front) 7° Nipple Angle (Rear) 5° \u0026 7° (customizable) Tire Pressure Range 100–125 psi Max Rider Weight 120 kg Flatness Tolerance \u0026lt;0.15mm Roundness Tolerance \u0026lt;0.3mm Dynamic Balance \u0026lt;3g Weight Variants Grade Weight per Rim Best For Standard 440 ± 15g Training builds, heavier riders (up to 120kg) Superlight 415 ± 10g Endurance gravel racing, mixed terrain Ultralight 390 ± 10g Competitive gravel racing, weight-optimized builds Extreme Light 370 ± 10g Elite racing; best paired with riders under 75kg Trade-off Note The Extreme Light (370g) layup prioritizes weight reduction over impact margin. For riders over 90kg or on highly technical, rock-strewn terrain, the Superlight (415g) or Standard (440g) grade is recommended to maintain spoke tension integrity over \u0026gt;280kg and forward compressive strength \u0026gt;300kg. Structural Performance Data Forward Compressive Strength: \u0026gt;300kg Lateral Torsion Resistance: \u0026gt;50kg Spoke Hole Tension Tolerance: \u0026gt;280kg Dynamic Equilibrium: \u0026lt;3g imbalance Flatness: \u0026lt;0.15mm Roundness: \u0026lt;0.3mm Use-Case Fit Gravel Racing (mixed surface): 34mm internal width supports 40–50mm tires at lower pressures for traction; 40mm depth adds aero efficiency on open road sections. Endurance \/ Bikepacking: 35mm depth lowers crosswind sensitivity while retaining structural stiffness for loaded builds. Custom Wheelset Builds (OEM\/Brand): Customizable spoke hole diameter (4.5mm std), nipple angles, valve hole size, and branding options make this rim suitable for small and medium cycling brands sourcing OEM-ready components. Tubeless Setup: 25mm inner width and tubeless-compatible bead profile support tubeless conversion with standard tape and valves. Customization Options Spoke hole diameter: 4.5mm standard or custom Valve hole diameter: 6.5mm standard or custom Assembly hole diameter: 7.5mm standard or custom Nipple angle: customizable per front\/rear application Logo, color finish, and decal options available for brand partners Frequently Asked Questions Is a 34mm wide carbon rim too wide for gravel riding? No. A 34mm external \/ 25mm internal width is within the optimal range for gravel-specific tire fitment (38–50mm tires). It provides a supportive bead base that improves tire casing shape, lowers rolling resistance, and allows lower inflation pressures for better traction on loose surfaces. What is the difference between the 35mm and 40mm depth options? The 35mm profile is shallower, reducing crosswind sensitivity and weight — better suited for technical or mountainous gravel routes. The 40mm profile provides modest aerodynamic gain on flat or open sections. Both share the same 34mm\/25mm width and structural tolerances. How light can a carbon gravel rim be without sacrificing durability? At 390g (Ultralight) and 370g (Extreme Light), both grades maintain spoke hole tension tolerance \u0026gt;280kg and forward compressive strength \u0026gt;300kg. The Extreme Light grade is best suited for riders under 75–80kg on non-technical terrain. The Ultralight (390g) is the recommended balance point for most competitive applications. Is this rim compatible with tubeless tires? Yes. The rim features a tubeless-compatible bead profile with a 25mm internal width. Standard tubeless rim tape and valves (6.5mm valve hole) are required; these are not included. What spoke count and hole pattern does this rim use? This rim uses a 24-hole pattern, suitable for building lightweight disc brake gravel wheelsets with standard J-bend or straight-pull spokes. Custom hole counts may be available — contact us for OEM enquiries. What is the warranty and quality assurance policy? All rims are backed by a three-year warranty. Each unit is manufactured to flatness \u0026lt;0.15mm and roundness \u0026lt;0.3mm tolerances, with dynamic balance verified at \u0026lt;3g per rim.\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Carbon Fiber Sporting Goods\"\n  },\n  \"category\": \"UV shape\",\n  \"image\": [\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/wave_103dc58c-767a-4254-b1e6-bec5e9d67bf1.png?v=1729759302\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/3_5152fef3-c379-4997-8c0d-2a3ef9531614.png?v=1732604010\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/tubeless_2d236823-c069-4581-9a8b-1fc9dd7a0b4b.jpg?v=1767150768\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/surface_f1230322-3ddf-4fd0-b237-7adb3e4ce7e9.jpg?v=1767150768\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/redbola_8887e641-3de0-41c4-a66e-78e20cb4c614.jpg?v=1767150768\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/whitebola_b4d67109-868c-42a8-b0df-fde348a22fa0.jpg?v=1767150768\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/yellowbola_fc7a6a6f-184a-49ca-9fe0-5882f00cffe8.jpg?v=1767150768\"\n  ],\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"price\": \"260.00\",\n    \"priceCurrency\": \"USD\",\n    \"url\": \"https:\/\/bolacarbon.com\/products\/700c-34mm-wide-carbon-gravel-bike-rim-with-35mm-and-40mm-wave-24-spoke-disc-brake-superlight-and-ultralight-even-exteme-light-bola\",\n    \"seller\": {\n      \"@type\": \"Organization\",\n      \"name\": \"https:\/\/bolacarbon.com\"\n    }\n  }\n}\n\u003c\/script\u003e","brand":"Carbon Fiber Sporting Goods","offers":[{"title":"UD Matt \/ Standard","offer_id":48133317329150,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ Superlight","offer_id":48133317361918,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ Ultralight","offer_id":48133317394686,"sku":null,"price":330.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ Extremelight","offer_id":48133317427454,"sku":null,"price":340.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ Standard","offer_id":48133317460222,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ Superlight","offer_id":48133317492990,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ Ultralight","offer_id":48133317525758,"sku":null,"price":330.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ Extremelight","offer_id":48133317558526,"sku":null,"price":340.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ Standard","offer_id":48133317591294,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ Superlight","offer_id":48133317624062,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ Ultralight","offer_id":48133317656830,"sku":null,"price":330.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ Extremelight","offer_id":48133317689598,"sku":null,"price":340.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ Standard","offer_id":48133317722366,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ Superlight","offer_id":48133317755134,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ Ultralight","offer_id":48133317787902,"sku":null,"price":330.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ Extremelight","offer_id":48133317820670,"sku":null,"price":340.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/wave_rims_512e095a-18ab-4660-add6-dbe651d0d7f8.jpg?v=1780298379","url":"https:\/\/bolacarbon.com\/ar\/products\/700c-34mm-wide-carbon-gravel-bike-rim-35mm-40mm-depth-24h-disc-brake-370-440g-bola","provider":"Bola Carbon Wheelset ","version":"1.0","type":"link"}