I ran a set of 30 x 11.50 Thornbirds for about 12,000 miles without hardly any wear (except gouges from the rocks). I had them at 17 psi on the street and about 9 psi on the trail. I went with Thornbirds because they are fiberglass belted and I commuted about 55 miles a day. They are a good compromise between a radial and a bias-ply tire. I've heard mixed opinions on them though, they are quite heavy, but wider than comparable height tires. I liked them better than my BFG Mud Terrains (33x12.50) or current Wild Countrys (33x12.50). I'm not sure how well they would fit on a Track/Kick. They worked great for me in mud, rocks, sand, dirt, and snow. I even won the 1997 AITC on them.
