This is a A-40X22 Sprocket PN: 40X22Main Description As Following : A-40X22 Sprocket P.N: 40X22 Hub Required: XInside Diameter: 2"Outside Diameter: 3.778"Teeth: 22 Crossed From: WSS104022 , , 20004022 , , 20004022 , , 2827-38527 JOHN DAY , 3016-0150 , , 6713-50313 JOHN DAY , 673-S80402200 , , 673S80402200 , 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: 3.778" Teeth: 22