{"product_id":"box-hex-lab-carbon-20-rim-451mm-28h","title":"Box Hex Lab Carbon 20\" Rim 451mm 28h","description":"\u003ch1\u003eBox Hex Lab Carbon Rim — 20\" (451mm), 28h\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Box Hex Lab Carbon is a premium 20\" BMX rim engineered from ultra high modulus carbon fiber with oversized technology for maximum stiffness. The 28-hole design with symmetrical dihedral angle stabilizers delivers responsive steering and pedaling stiffness without excess material. Available in brake-track (rear) and brake-less (front) profiles, the rim supports both tubeless and tubed tire configurations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCritical Safety Notice\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese rims require Box One Carbon replacement brake pads and cannot be used with standard aluminum rim brake pads. Use of incompatible brake pads will void warranty and may result in brake failure. Only compatible with carbon-specific brake pads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra high modulus carbon fiber\u003c\/strong\u003e — Stiffer carbon variant maximizes structural rigidity for responsive steering and power transfer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOversized Technology™\u003c\/strong\u003e — Strategic material placement optimizes load paths from bars through fork to rim (steering) and from pedals through cranks to rear rim (pedaling)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSymmetrical dihedral angle stabilizers\u003c\/strong\u003e — Sculpted spoke bed geometry bridges the angle between angled rim flanks and vertical plane, achieving stiffness and durability of broader rim profiles without extra weight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachined brake track\u003c\/strong\u003e — Precision-finished braking surface ensures consistent pad contact and stopping power (rear profile only)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTubeless ready\u003c\/strong\u003e — Bead lock compatible design supports tubeless tire setups with appropriate rim tape and sealant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight 28-hole design\u003c\/strong\u003e — Hole count optimizes spoke count for strength while minimizing overall weight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoil-stamped chrome logos\u003c\/strong\u003e — Durable branding resistant to wear and fade\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRim size: 20\" (451mm diameter)\u003c\/li\u003e\n\u003cli\u003eHole count: 28\u003c\/li\u003e\n\u003cli\u003eMaterial: Ultra high modulus carbon fiber\u003c\/li\u003e\n\u003cli\u003eInternal rim width: 22mm\u003c\/li\u003e\n\u003cli\u003eExternal rim width: 22mm\u003c\/li\u003e\n\u003cli\u003eERD (effective rim diameter): 369mm\u003c\/li\u003e\n\u003cli\u003eProfiles: Brake track (rear) and brake-less (front)\u003c\/li\u003e\n\u003cli\u003eFinish: Foil-stamped chrome logos\u003c\/li\u003e\n\u003cli\u003eBrake compatibility: Carbon brake pads only (Box One Carbon Replacement Pads recommended)\u003c\/li\u003e\n\u003cli\u003eSpoke tension: 110–115 kgf recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility \u0026amp; Ideal Use Cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWheel size: 20\" BMX wheels with 28-spoke hubs\u003c\/li\u003e\n\u003cli\u003eBrake system: V-brake only with carbon-specific brake pads; not disc-compatible\u003c\/li\u003e\n\u003cli\u003eTire setup: Tubed or tubeless-ready with appropriate rim tape and sealant\u003c\/li\u003e\n\u003cli\u003eBest for: BMX racers; riders prioritizing maximum stiffness and response\u003c\/li\u003e\n\u003cli\u003eIdeal use: Racing wheels; high-performance race builds with matching Box components\u003c\/li\u003e\n\u003cli\u003eWheel building: ERD 369mm; calculate spoke length accordingly for your hub\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePair with 28-hole compatible hub and carbon brake pads only. Verify hub spoke hole count matches 28h before wheel building. For tubeless setup, use compatible tubeless rim tape and sealant. Consult Box documentation for proper brake pad installation. Do not use aluminum rim brake pads—they are incompatible and will void warranty.\u003c\/p\u003e\n\u003ch4\u003eFAQ\u003c\/h4\u003e\n\u003cp\u003eQ: What is the recommended spoke tension for this rim?\u003cbr\u003eA:We recommend a spoke tension of between 110kg and 115kg; remember, every rim is different.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\n\u003ci\u003e\u003cu\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/u\u003e\u003c\/i\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003ci style=\"font-size: 0.875rem;\"\u003e\u003cu\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/u\u003e\u003c\/i\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003ci style=\"font-size: 0.875rem;\"\u003e\u003cu\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cb\u003e**Due to unique nature of this item, ALL sales of this product are FINAL. No Refunds or Returns**\u003c\/b\u003e\u003c\/span\u003e\u003c\/u\u003e\u003c\/i\u003e\u003c\/div\u003e","brand":"Box","offers":[{"title":"Black \/ Wheels - 20\"x1-1\/8\"-1-3\/8\" (451MM) \/ Rear","offer_id":45483781095603,"sku":"BX-RM21C20118R-BK-Black-Wheels-20x1-18-1-38451MM-Rear","price":449.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ Wheels - 20\"x1-1\/8\"-1-3\/8\" (451MM) \/ Front","offer_id":45483781128371,"sku":"BX-RM21C20118R-BK-Black-Wheels-20x1-18-1-38451MM-Front","price":449.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8737\/2979\/files\/box-hex-lab-carbon-20-rim-451mm-28h_5665f5e6-128c-4948-a905-95ab5c89ddd5.jpg?v=1783448379","url":"https:\/\/time2shinebmx.com\/products\/box-hex-lab-carbon-20-rim-451mm-28h","provider":"Time 2 Shine ","version":"1.0","type":"link"}