{"product_id":"crupi-os20-2-0-pro-3x-race-frame","title":"Crupi OS20 2.0 Pro 3X Race Bike Frame","description":"\u003ch1\u003eCrupi OS20 2.0 Pro 3X Race Bike Frame\u003c\/h1\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003e\n  The Crupi OS20 2.0 Pro 3X Race Frame is a completely redesigned, USA-handbuilt BMX race frame engineered for tall riders who demand the stability and rolling advantage of the oversized 451mm wheel format. \"OS\" stands for Over-Sized - a 20\" wheel class favored by serious racers who want more rim diameter underfoot without sacrificing race-proven geometry. This updated 2.0 version retains Crupi's race-winning geometry while introducing wrap-around seat stays, a slightly shorter seat tube, and a built-in Disc Adapter that eliminates the need for axle-mounted add-ons.\n\u003c\/p\u003e\n\u003cp\u003e\n  Constructed from seamless drawn 6061 T6 butted aluminum, every tube is carefully shaped - squared ends for maximum weld surface, a large square down tube for stiffness, and teardrop-profile chain stays for an exceptionally rigid rear end. With a 23\" top tube and compatibility with standard Pro 20\" forks, this frame is purpose-built for riders 6' and taller who are serious about competition.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAll-American Handbuilt Construction:\u003c\/strong\u003e Every frame is hand built in the USA from seamless drawn 6061 T6 butted aluminum tubing for race-ready quality.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOS20 \/ 451mm Wheel Compatibility:\u003c\/strong\u003e Designed for the oversized 451mm rim and tire format, delivering extra stability and rolling diameter on the track.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e23\" Top Tube:\u003c\/strong\u003e Sized for riders 6'+ for a confident, stretched-out race position.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWrap-Around Seat Stays:\u003c\/strong\u003e New 2.0 design feature that improves rear-end stiffness and frame rigidity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-In Disc Adapter:\u003c\/strong\u003e Integrated disc brake mount eliminates the need for separate axle-mounted adapters - compatible with Tektro, TRP Evo, TRP Slate, and all Shimano hydraulic disc kits (requires Crupi Disc Adapter Kit and 120mm rotor).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro Taper Head Tube \u0026amp; EB24 Euro BB:\u003c\/strong\u003e Level 2.0 Race Frame spec includes a Pro Taper head tube and traditional EB24 Euro bottom bracket standard.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTeardrop Chain Stay Tubes:\u003c\/strong\u003e Specially shaped for maximum stiffness and strength in the rear triangle.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Down Tube:\u003c\/strong\u003e Larger diameter, square-profile down tube significantly stiffens the front end of the frame.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParallel 3\/8\" (10mm) Axle Slots:\u003c\/strong\u003e Ground-parallel dropout slots ensure consistent frame geometry regardless of rear wheel position.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThicker 3D Dropouts \u0026amp; V-Brake Posts:\u003c\/strong\u003e Extra-thick dropouts for disc brake rigidity, while standard brake posts retain full V-brake compatibility.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFork Compatibility:\u003c\/strong\u003e Geometry based on the Answer Dagger OS20 fork, but most standard Pro 20\" forks will work - no OS20-specific fork required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCrupi OS20 2.0 Pro 3X Race Bike Frame\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy You'll Love It\u003c\/h2\u003e\n\u003cp\u003e\n  Crupi has been a trusted name in BMX racing for decades, and the OS20 2.0 Pro 3X Frame is a testament to that legacy - built by hand in the USA with the kind of attention to detail that only comes from a brand that lives and breathes the sport. The 451mm OS20 format gives taller racers a genuine competitive edge, with more wheel rolling diameter and planted stability through turns and rhythm sections. The all-new built-in disc adapter and updated frame geometry mean this isn't just an incremental update - it's a fully refined race tool. Whether you're gate-dropping at a local track or competing at the national level, this frame is engineered to handle the demands of elite BMX racing. Because Crupi frames are handbuilt in small batches, each one carries the quality and care of true American craftsmanship. If you're serious about race BMX and you need a frame that keeps up with your ambition, the OS20 2.0 Pro 3X is the one to have.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cdiv class=\"custom-product-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eView Product Specs\u003c\/strong\u003e\u003c\/summary\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n  \u003ctr\u003e\n\u003cth\u003eTop Tube Length\u003c\/th\u003e\n\u003ctd\u003e23\"\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eWheel Size Compatibility\u003c\/th\u003e\n\u003ctd\u003eOS20 \/ 451mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eFrame Material\u003c\/th\u003e\n\u003ctd\u003eSeamless Drawn 6061 T6 Butted Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eHead Tube Type\u003c\/th\u003e\n\u003ctd\u003ePro Taper\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eBottom Bracket Standard\u003c\/th\u003e\n\u003ctd\u003eEB24 Euro BB\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eAxle Slot Size\u003c\/th\u003e\n\u003ctd\u003e3\/8\" (10mm), parallel to ground\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eDisc Brake Compatibility\u003c\/th\u003e\n\u003ctd\u003eTektro, TRP Evo, TRP Slate, all Shimano hydraulic kits (requires Crupi Disc Adapter Kit + 120mm rotor)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eV-Brake Compatibility\u003c\/th\u003e\n\u003ctd\u003eYes - brake posts included\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eRecommended Rider Height\u003c\/th\u003e\n\u003ctd\u003e6' and taller\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eHandbuilt in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cdiv class=\"custom-product-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the OS20 wheel format and why would I choose it?\u003c\/summary\u003e\n    \u003cp class=\"faq-content\"\u003eOS20 stands for Over-Sized 20\" - it refers to the 451mm rim and tire standard, which is slightly larger in diameter than the traditional 406mm BMX wheel. Taller racers often prefer it for the added stability and extra rolling diameter, which can smooth out rough track surfaces and help maintain momentum through corners and transitions. If you're 6' or taller and want a more planted, confidence-inspiring feel on the track, the OS20 setup is worth serious consideration.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I need a special OS20-specific fork?\u003c\/summary\u003e\n    \u003cp class=\"faq-content\"\u003eNot necessarily. The OS20 2.0 frame geometry was based on the Answer Dagger OS20 fork, but most standard Pro 20\" forks are compatible with the OS20 wheel. This gives you a lot of flexibility in fork choice without being locked into a niche product category.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhich disc brake kits are compatible with this frame?\u003c\/summary\u003e\n    \u003cp class=\"faq-content\"\u003eThe built-in disc adapter on this frame is compatible with Tektro, TRP Evo, TRP Slate, and all Shimano hydraulic disc brake kits. Note that Hope, Avid, and all mechanical disc kits are not compatible. You must also use Crupi's Disc Adapter Kit along with a 120mm rotor for proper fit. V-brakes are also fully supported via standard brake posts.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this frame sold as frame-only or as a complete bike?\u003c\/summary\u003e\n    \u003cp class=\"faq-content\"\u003eThis listing is for the frame only. You will need to source your own fork, headset, bottom bracket, cranks, bars, stem, wheels, brakes, and other components separately to build it up into a complete race bike.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy is this frame sometimes out of stock?\u003c\/summary\u003e\n    \u003cp class=\"faq-content\"\u003eAll Crupi frames are hand built in the USA in small batches, which means inventory moves quickly. If your preferred color or size is unavailable, you can contact Crupi directly to be placed on a priority list - when that frame becomes available, you'll have the first opportunity to purchase it.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e","brand":"Crupi BMX","offers":[{"title":"Black \/ with BlackWht Fade decals","offer_id":57270035153201,"sku":"70821","price":779.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ with RedBlack Fade decals","offer_id":57270035185969,"sku":"sku-42260238729305","price":779.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ with BlueBlack Fade decals","offer_id":57270035218737,"sku":"sku-42260238762073","price":779.99,"currency_code":"USD","in_stock":true},{"title":"White \/ with BlackWht Fade decals","offer_id":57270035251505,"sku":"70825","price":779.99,"currency_code":"USD","in_stock":true},{"title":"White \/ with RedBlack Fade decals","offer_id":57270035284273,"sku":"sku-42260238860377","price":779.99,"currency_code":"USD","in_stock":true},{"title":"White \/ with BlueBlack Fade decals","offer_id":57270035317041,"sku":"sku-42260238893145","price":779.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1724\/7681\/files\/2026Pro2XBlackwBlkWhtFade.jpg?v=1793648368","url":"https:\/\/omahasportsandgames.com\/products\/crupi-os20-2-0-pro-3x-race-frame","provider":"Omaha Sports \u0026 Games","version":"1.0","type":"link"}