This is a A-50X29 Sprocket PN: 50X29Main Description As Following : A-50X29 Sprocket P.N: 50X29 Hub Required: XInside Diameter: 2"Outside Diameter: 6.122"Teeth: 29 Crossed From: WSS105029 , , 20005029 , , 20005029 , , 3016-0200 , , 6713-52313 JOHN DAY 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: 6.122" Teeth: 29