What sizes are you running now Chaser? 16x6.50-8's are normal for the fronts, and I believe the 23x10.50-12's are standard for the rears. If you have the fender clearance, you could possibly go as big as 26x12-12 on the rears. Not sure, but you might be able to go with 18x8.50-8's on the fronts, but your sidewalls might look a little "sucked-in" with the standard rims.