{"product_id":"s-m-atf-xl-frame-20-wheels","title":"S\u0026M ATF XL Frame (20\" Wheels)","description":"\u003ch1\u003eS\u0026amp;M ATF XL Frame (20\" Wheels)\u003c\/h1\u003e\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe S\u0026amp;M ATF XL is an extended-geometry version of the ATF frame engineered for riders 6'1\" and taller. Features a 5\" integrated head tube, 9\" standover height, and top tube options up to 22\" for proper fit on taller riders. Built with butted Thermal-X chromoly tubing and 4Q-Baked dropouts for durability across street, park, and dirt applications.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended XL geometry\u003c\/strong\u003e – 5\" integrated head tube and 9\" standover provide adequate clearance and reach for riders over 6'1\" without the handling compromises of upsized standard frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour top tube options\u003c\/strong\u003e – 21\", 21.25\", 21.5\", and 22\" lengths allow precise cockpit sizing based on torso length and arm reach preferences\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eButted Thermal-X tubeset\u003c\/strong\u003e – Variable-thickness chromoly tubing removes material from low-stress zones while reinforcing critical areas to reduce weight without sacrificing impact resistance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated seat clamp\u003c\/strong\u003e – Built-in clamp eliminates external hardware for cleaner aesthetics and removes a common failure point from overtightened traditional clamps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4Q-Baked dropouts\u003c\/strong\u003e – Heat-treated 14mm slot dropouts increase material hardness to prevent flex, cracking, and thread wear under high torque loads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMid BB height (11.7\")\u003c\/strong\u003e – Balanced bottom bracket position provides stability without excessive pedal strike risk during grinds or low-clearance obstacles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread-on 990 brake mounts\u003c\/strong\u003e – Removable U-brake bosses maintain clean frame lines when running brakeless, sold separately for riders who need braking capability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop Tube Lengths:\u003c\/strong\u003e 21\", 21.25\", 21.5\", 22\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear End Length:\u003c\/strong\u003e 13.4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Tube Angle:\u003c\/strong\u003e 75°\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Tube Style:\u003c\/strong\u003e Integrated (45°\/45°, 41.8mm internal diameter)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat Tube Angle:\u003c\/strong\u003e 71°\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat Clamp:\u003c\/strong\u003e Integrated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat Post Size:\u003c\/strong\u003e 1\" (25.4mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBottom Bracket Height:\u003c\/strong\u003e 11.7\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBottom Bracket Style:\u003c\/strong\u003e Mid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandover Height:\u003c\/strong\u003e 9\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake Mounts:\u003c\/strong\u003e Thread-on 990 (mounts sold separately)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDropouts:\u003c\/strong\u003e 14mm slot, 4Q-Baked\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGyro Tabs:\u003c\/strong\u003e None\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.75 lb (2.15 kg)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTubeset:\u003c\/strong\u003e Butted Thermal-X chromoly tubing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility and Ideal Use Cases\u003c\/h2\u003e\n\u003cp\u003eThis frame is designed for standard 20\" BMX wheels, not cruiser class. Requires forks with integrated race systems (45°\/45° angular contact bearings with 41.8mm crown race diameter). The integrated seat clamp accepts 1\" (25.4mm) diameter seat posts only—verify compatibility with your existing post. 14mm slot dropouts work with 14mm bolt-on axles or 3\/8\" axles using adapter sleeves. Thread-on 990 brake mounts must be purchased separately if you run brakes. No gyro tabs means this frame supports brakeless or direct-cable brake setups only. Best suited for riders 6'1\" and taller who need extended reach and standover clearance for technical street riding, park sessions, and transitions. The 13.4\" rear end length and 75° head tube angle provide responsive steering while maintaining stability at speed.\u003c\/p\u003e","brand":"S\u0026M Bikes","offers":[{"title":"Army Green \/ 21\"","offer_id":45193717907635,"sku":"01-ATF-XL-GRN-21.0","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Army Green \/ 21.25\"","offer_id":45037209649331,"sku":"01-ATF-XL-GRN-21.25","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Army Green \/ 21.5\"","offer_id":45037209682099,"sku":"01-ATF-XL-GRN-21.5","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Army Green \/ 22\"","offer_id":45037209714867,"sku":"01-ATF-XL-GRN-22","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Challenger Red \/ 21\"","offer_id":45037209485491,"sku":"01-ATF-XL-CHLLRED-21.0","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Challenger Red \/ 21.25\"","offer_id":45037209518259,"sku":"01-ATF-XL-CHLLRED-21.25","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Challenger Red \/ 21.5\"","offer_id":45037209551027,"sku":"01-ATF-XL-CHLLRED-21.5","price":524.95,"currency_code":"USD","in_stock":true},{"title":"Challenger Red \/ 22\"","offer_id":45037209583795,"sku":"01-ATF-XL-CHLLRED-22","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Trans Black \/ 21\"","offer_id":45037209354419,"sku":"01-ATF-XL-TBLK-21.0","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Trans Black \/ 21.25\"","offer_id":45037209387187,"sku":"01-ATF-XL-TBLK-21.25","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Trans Black \/ 21.5\"","offer_id":45037209419955,"sku":"01-ATF-XL-TBLK-21.5","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Trans Black \/ 22\"","offer_id":45037209452723,"sku":"01-ATF-XL-TBLK-22","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Trans Burgundy \/ 21.5\"","offer_id":45225675751603,"sku":"01-ATF-XL-TBURG-21.5","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Trans Teal \/ 21\"","offer_id":45235596853427,"sku":"01-ATF-XL-TEAL-21.0","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Trans Teal \/ 21.25\"","offer_id":45037209223347,"sku":"01-ATF-XL-TEAL-21.25","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Trans Teal \/ 21.5\"","offer_id":45037209256115,"sku":"01-ATF-XL-TEAL-21.5","price":524.95,"currency_code":"USD","in_stock":false},{"title":"Trans Teal \/ 22\"","offer_id":45037209288883,"sku":"01-ATF-XL-TEAL-22","price":524.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8737\/2979\/files\/01_ATF_XL_GRN_LEFT.jpg?v=1776545393","url":"https:\/\/time2shinebmx.com\/products\/s-m-atf-xl-frame-20-wheels","provider":"Time 2 Shine ","version":"1.0","type":"link"}