I've put about 120k miles on those tires. 55k on my first set of 35's, pulled em off when I dropped in height. Front two were about 30%, rears pretty bald. Go figure. The second set was 305/50/18s and I put about 40k on them, and had one start seperating in the sidewall. Keep in mind that the truck lived with a 32' triple axle enclosed car trailer behind it. Sidewall showed seperation at Carroll Shelby's birthday bash in Vegas after a cross country jaunt in 100+ degree heat grossing 27k lbs. Put a 3rd set on, and ended up selling those wheels and tires. They wore great, rode great, and were quiet..if you kept them rotated. They'd get noisy when it came time to rotate.