I had over 80,000 miles on my first set of BFG ATs on a 1/2 ton, and have gotten 60,000 miles apiece on 2 sets of them on my 3/4 ton so I'm not sure how some are only getting 30,000 out of them as they're some of the longest-lasting tires I've ever used. If you're using them for rock crawling, then I wouldn't expect that kind of mileage on them...