I had 37x12.50/16.5's on 16.5x9.75 on my old 99. I just took a grinder to the plastic inner finder, the corner of the fender and trimmed just a tad bit off the bumper. If you decide to trim the inner fender be careful because there are some wires attacked to the backside of the plastic inner fender. Oh and by the way my 99 only had 2,000 miles when I cut it up so dont be scared. And it looked so much better with no lift and big tires then some trucks Ive seen with big lift and small tires.