80 yr. old grandpa ride
I have a 2007 coupe Z4 3.si that has non run flats and looking for a better ride . What are other's opinion about switching to smaller wheels with more tire for cushioning . Maybe off the non si Z4 or a Z3 . I would prefer 4 or 5 matching wheels to make it a true turing car . What should I be watching for on the used wheel market ?