Rear Pulley Sprocket Spacer 3/8" (.375") for Harley-Davidson Custom Wide Tire Billet Rear Pulley/Sprocket Spacer3/8" (.375") Machine finish. Made in USA by Ultima Fits Harley-Davidson models .3-7/8" O.D. 1-1/2" I.D. Offset O.D. 2" *Product ID = 726