I have a set of Pro Comp Xtreme Terrains 315/75R16s D rated, about 40,000 miles of heavy hauling. (about 3-5,000lbs in the bed) and still have well over half of the tread left and I have only rotated them once. I also sledpull with them and I have been in the top 3 of my class 7 out of 8 pulls. I can't complain.