[rotorwrench]

1940 has a point that is worth consideration. During braking, the rear drive train goes the opposite direction from the drive push it has under acceleration. This can even affect the condition of the engine mounts. It all moves more than a person might think it would if there is a lot or wear. The concentricity of the drums would still be the most important thing to the operation of the system. This affects the hubs as well as the drums.