Excessive or uneven tyre wear can be caused by faults in which of the following:
Gearbox
Suspension
Exhaust system
Explanation: Cupped or scalloped dips appearing around the surface of the tyre tread wear could indicate loose, worn or bent suspension parts. Shocks and struts are the most likely culprit because they provide damping force to control tyre movement. When the tyres move excessively, the scalloped pattern can appear.
