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The Harley-Davidson factory 6-speed ratios are: 1st (3
Crown-cut design offers increased cooling capacity while lowering the mass
2003-2012 KTM 85 SX (17/14)
Ideal for both recreational and racing use
2015-2018 Polaris Sportsman 570 Touring
Renthal 1120-520-50GPBK REN Rear Sprockets fuel-air-fuel-injection The Harley-Davidson factory 6-speed ratiosRenthal Twinring motocross rear sprocket was developed as the ultimate dirt bike rear sprocket for those looking to ride more and work less. The unique, dual material design combines a hardened steel outer chain ring that is heated to 200degreeC before being permanently fitted to our Ultralight aluminum inner, creating a permanent bond for the life of the sprocket.
