This is a A-60X48 Sprocket PN: 60X48Main Description As Following : A-60X48 Sprocket P.N: 60X48 Hub Required: XInside Diameter: 2"Outside Diameter: 11.893"Teeth: 48 Crossed From: WSS106048 , , 3016-0263 , , 6713-55113 JOHN DAY , 673-S80604800 , , 673S80604800 , 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: 11.893" Teeth: 48