Does over inflation cause tire cupping?
Yes, it can but cupping can also have other causes. Over
inflated tires can tend to bouce more, especially when combined
with weak/worn shocks or struts. When tires bounce cupping can
occur when the tires strike the road. Cupping can also be caused by
the tire/wheel assembly being out of balance (which can also cause
the tires to bounce). Cupping is just one of several types unusual
wear on tires.