I had a flat tire on Friday 3/10/06 in the am. It was completely flat and I had to drive for about 1/8th of a mile to get out of traffic before I could change it. There is now a small ring on the sidewall from where I drove on the tire. I wouldn't want to put my Z into the center divider because of a $120 tire blowout. Please advise on whether I should go ahead and change the tire of if I am worrying too much. TIA