I am having a problem with tire seperation on the rear tires of my car. The tires are not very expensive tires. They are $100 dollar Yokohamas. Maybe this is my problem. Do I really need to buy upper end tires. The fron don't have that problem only the rear. I put fresh tires in there and they last about 6 months until they disfigure and perform terrible. Somebody suggested the struts being faulty. I am in the process of purchasing brand new upper end Pirellis but don't want to purchase them if I have a problem that will seperate the new tires as well. Let me know if this ever happened to you.