This is a A-60X36 Sprocket PN: 60X36Main Description As Following : A-60X36 Sprocket P.N: 60X36 Hub Required: XInside Diameter: 2"Outside Diameter: 9.023"Teeth: 36 Crossed From: WSS106036 , , 20006036 , , 20006036 , , 3016-0252 , , 6713-54863 JOHN DAY , 673-S80603600 , , 673S80603600 , Found in Section & Models : Chains/ Sprockets/ Pulleys/ Hubs > Sprockets, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Hub Required: X Inside Diameter: 2" Outside Diameter: 9.023" Teeth: 36