This Disc is for the Front of the Early Model Odes 800 and has a O.D. of just under 8"This also fits the HiSun early models with 12" Rims/Wheels, just looks different in the center by the hub and is a stronger design that the HiSun.
10 x 1.25 x 22mm Most Common, comes with 2 Copper Washers
Some Models use the finer Thread 10x1.0, let us know if. needed instead
