Distance brake drums, brake discs, sprockets and belt pulleys.

Wheel hubs and the parts that are flanged on are often no longer original parts. Different manufacturers work with different manufacturing tolerances. Or the resourceful mechanic combines parts that were not designed for each other by the factory. There are many reasons why a brake drum touches the spoke flanges, the brake disc is not centered in the brake caliper or the sprocket or belt wheel is not aligned with its counterpart on the transmission? The solution is Bates shims. They are available in a wide range of inside diameters, bolt circles and thicknesses. So that everything is aligned in the end.