I've got about as many miles on my set of 265/70/15 AT Revos as anyone. I just went past 30k and there was 9/32 of tread left. These tires (P metric size) had 13/32 to start with.

With 4/32 wear in 30k, these tire should go 60k without a problem. I love the tires. Off road ability (that rarely gets tested) but sticks to wet or dry pavement like glue and gives a quiet ride to boot. There are cheaper tires out there, but I doubt that there are any much better.