This is a A-60V09 Sprocket PN: 60V09Main Description As Following : A-60V09 Sprocket P.N: 60V09 Hub Required: VInside Diameter: 1 1/8"Outside Diameter: 2.51"Teeth: 9 Crossed From: WSS106009 , , 20006009 , , 20006009 , , 2827-40727 JOHN DAY , 3016-0225 , , 6713-53513 JOHN DAY , 673-S80600900 , , 673S80600900 , Found in Section & Models : Chains/ Sprockets/ Pulleys/ Hubs > Sprockets, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Hub Required: V Inside Diameter: 1 1/8" Outside Diameter: 2.51" Teeth: 9