Both rear tires, pirelli pzero 275/45zr18, were severely worn at 7430 miles. they were replaced by the dealer at my expense of approximately $950.00. i am a very conscientious driver and check the tire pressures daily. i believe this is a potential safety issue, since you would not expect tires to be on the verge of blowing out with just 7,400 miles. i have the tires in my possession. *tr