The Goped Drive Spindle Bolt Fits: Sport, X-Ped, Super X-Ped, Go Quad M6x45: Fits most aftermarket Short and Long drive spindles also Including Meyer Racing, ADA, DDM and others. Also fits the Bigfoot 3rd bearing support drives madd by ADA Racing.
M6x50: is for the Geo Sport, Geo X ped and S25.