and how much tread do you have left? i'm running 35" mt/rs and i've got 15K on them. i was at the tire store on tuesday and they had a set of the exact same tires i'm running sitting out, so i measured the depth of the tread against my tires - and my tires don't show any change in tread depth! i'm pretty stoked about that. my brother and step-dad run 33" mt/r's on their jeeps and they get about 60k total on their tires, so i should be at about 75% if they are the standard, not nearly 100%. i rotate my 5th in, and have them rotated about every 3000 miles or so and re-balanced. i figure if i get that service for free, i better take advantage of it!