Well, I put 30x9.5 on my 2000 s-10 4x4 last week. I had already added leafs a few weeks ago, then the night before I had the tires mounted I cranked the torsion bars, got about 1.5" out of the torsion bars even after I backed off from all the way cranked. The front end is stiffer but not outrageous. I had Dayton Timberline A/T's put on. Good looking set of tires,, I've never seen any comparison tests with these tires, but I've heard nothing but good things about them... I can feel a slight bit of exceleration loss. a few tough shifts from 2nd to 3rd (automatic trans) and to many overdrive shifts at highway speed.. Not sure if I'l do anything about that.. I haven't messed with any performance add-on yet, so maybe after bumping up the hp with exhaust and few other things, those problems will go away... all in all I gained 3 inches (ok 2 7/8") of height in the front and a bit more in the back from everything I did. I'll have to take a pic and post it on here....