I just got my Pro Comp Xterrain 33x12.50x15 on 15x10 rock crawler wheels and put them on my 90 Jimmy. They did a great job Sunday when I tested them. Some roads were wet and got good traction on the wet concrete. On the highway they where very quite at 85mph. Didn't hear them at all unless you opened the window, then just a very low roar. Off road, they performed great. Great traction on gravel roads, taking off and stopping. I played in 8" to 10" of mud and they did a great job. Never felt like I was going to get stuck and they cleaned themself very good. I was able to climb steep mud and loose rock hills with very little if any tire spin. I do not have a posi or lock rear end. Both my front and rear ends are open with 3.73 gears. Just wanted to post this in case anyone was interested in these tires. I do not have a lift that I am aware of and they did fit ok. I didn't have to trim anything. I will have to trim a little if I do any major flexing. I didn't flex it that much over the weekend.