{"product_id":"acs-main-drive-freewheel","title":"ACS Main Drive Freewheel","description":"\u003cdiv\u003e\n\u003cp\u003eThe \u003cstrong\u003eACS Main Drive Freewheel\u003c\/strong\u003e is a straightforward, reliable replacement for BMX, single speed, and fixed-gear setups. It threads onto standard 1.375\"-24tpi hubs and uses a dual-pawl engagement system that clicks in every 18 degrees — consistent and predictable for everyday riding. The 4-notch removal interface works with ACS and most universal freewheel tools, so swaps are simple.\u003c\/p\u003e\n\u003cp\u003eAvailable in 16t and 17t, the Main Drive runs a \u003cstrong\u003e1\/2\" x 1\/8\" sprocket pitch\u003c\/strong\u003e — pair it with a 1\/8\" single speed chain. Not compatible with 3\/32\" chains, motor conversions, or high-torque jackshaft applications.\u003c\/p\u003e\n\u003cul class=\"specs_at_a_glance\"\u003e\n\u003cli\u003eSizes: 16t, 17t\u003c\/li\u003e\n\u003cli\u003eFinish: Silver\u003c\/li\u003e\n\u003cli\u003eThreading: 1.375\"-24tpi\u003c\/li\u003e\n\u003cli\u003eChain compatibility: 1\/2\" x 1\/8\" only\u003c\/li\u003e\n\u003cli\u003eEngagement: Dual-pawl, every 18 degrees\u003c\/li\u003e\n\u003cli\u003eRemoval: 4-notch universal tool interface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"ACS","offers":[{"title":"16t \/ Silver","offer_id":44161244889132,"sku":"63609-1000","price":14.99,"currency_code":"USD","in_stock":true},{"title":"17t \/ Silver","offer_id":44161244921900,"sku":"63630-1000","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/7684\/9196\/files\/acs-main-drive-freewheel-1409012.jpg?v=1771293676","url":"https:\/\/ricycles.com\/products\/acs-main-drive-freewheel","provider":"RA Cycles","version":"1.0","type":"link"}