hey i have an 89 5.0 coupe. right now i have a set of 15's but im getting cobra r wheels next week and i was wondering what tire size id need for the 17's? i figured it would be 245/45/17 but someone said they rub or something. so i figured i would ask. also do you guys think a BFG traction t/a is a good tire to get because i can get some pretty cheap right now. thanks guys.