A friends 97 NSX recently hit a pothole pretty badly and a few miles later, the tread completely came off the tire. Parts of the sidewall were intact so it didn't exactly have to sit on the rim until the tow truck came. In any case, he got it home and jacked it up to remove the tire and put on the spare... but after removing the wheel lock and 4 lug nuts, we couldn't pull the tire off. Are we missing a step somewhere?? Any suggestions?? Thanks!