This is a A-60X30 Sprocket PN: 60X30Main Description As Following : A-60X30 Sprocket P.N: 60X30 Hub Required: XInside Diameter: 2"Outside Diameter: 7.586"Teeth: 30 Crossed From: WSS106030 , , 20006030 , , 20006030 , , 3016-0246 , , 6713-54563 JOHN DAY , 673-S80603000 , , 673S80603000 , 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: 7.586" Teeth: 30