Quote Originally Posted by bluegtp91 View Post
That 235/55/17 is also the stock tire size for a '05+ Mustang wheel.

If they are '99-'04 Bullitt's...a 245/45/17 is correct IIRC.

The problem with the wheel gap is that you are not lowered...not that the tire is an incorrect size.
245/45 is correct for a Mustang, not for a GP.

Run 245/50. It will be perfect and have the stock wheel gap.