I have an 07 328XI. I am on my second set of run-flats and am experiencing "cupping" problems on all 4 tires. The "cupping" is on the inside tread of all 4 tires. This occurred on the original set of tires as well. The car has had its alignment checked twice and is in spec.'s. Am open for suggestions as to finding a resolution to this situation.
Most of the time when cupping occurs in tires it is because of the shocks getting weak and causing the tires to show cupping. Are the front and rear tires both doing this?
