Stock wheel and Largest tire size?

[kingkong401]

I want to put a little wider tire on the back of my gto. I want to use the same brand/type and they make it in a 255/45/17. Does anyone know if this tire will fit on the stock wheel and not rub on the fender lip? Or maybe a 255/40/17 in a kdw instead of kdws?

[Iron Horse]

Try this link:

http://www.ls1gto.com/forums/showthread.php?t=916&highlight=tire+size

[mike24]

What is the rim size on my new GTO , is it 17x7.5 or 17x8?

[Homebound GTO]

17x8