well time for tires again. right now i have 225/60-15. ofcourse most. if not all, stores dont carry them any more. id like to get my tires at walmart but they dont carry that size either. what id like to do is punch in a year of mustang that carries a size close to this on walmarts chart. and one know what years mustangs would be close to the size in fit.

 

You can match diameter by reviewing mfg charts, but it may require new/used larger rims eventually.