i had 245/45/17s on my ZR1s on Carmen. fit fine.

and dont worry about 275/40s on the front. i know people with 315/35s and they didnt need to modify much.


and are you sure you guys are reading the numbers right? a 275/45? and a 245/40? you sure you dont have those mixed up? to keep the same size as stock it should be 275/40 and 245/45. cuz chad if you ARE running those sizes, youve got almost an inch shorter in the front, and over an inch taller in the rear.

Yep I saw that in this Trans Am at a F-bodies meeting that I went in February,
This Trans am was Awesome, with 315's slicks tires all around.

http://img201.imageshack.us/img201/9084/315sjd7.jpg