I have 17x9 Cobra R 4 lugs with 275-40-17 Nittos on the back. All i did was kill the quad shocks. 235-40-17 on front only rub when i turn the wheel to it limit. You might be able to put a 315-40-17 on the rear,buts thats pushing it. Also if you are looking for cobra rims look for the 17's in the 2000 R style. Everboby seems to have these wheels and the 2000 R may be just a little different to set your car off from the others.
