This is a A-40V11 Sprocket PN: 40V11Main Description As Following : A-40V11 Sprocket P.N: 40V11 Hub Required: VInside Diameter: 1 1/8"Outside Diameter: 2.004"Teeth: 11 Crossed From: 3016-0139 , 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: 2.004" Teeth: 11