I'm not sure about the rear. I think both of us have 60's in front, though. I know I'm going to end up with 35" or taller tires. If I keep my 3. 54's the optimum RPM range for my engine will be well over 80 miles an hour. Not too good! BTW, I left strict instructions with my girlfriend to put stamps on the envelope/check I put together yesterday and get it in the mailbox. I'll follow that with a phone call in a few minutes, to preclude any blonde moments.