Terry - I found the mileage I got on the first set and it was 42k. The fronts were bald on the outside edge because of the alignment problem, but the rears were still OK for a couple thousand more miles. I kept the rears as spares and keep one in the truck so I have a spare that's the same height as the rest of the tires. By the way, the second set have 26k miles on them in 2 years and 10 months (not 1 1/2 years like I thought originally). I haven't been doing a good job of rotating either, it's been 14k miles since the last rotation, so I need to do it. I used to keep up with this stuff very meticulously, then the twins came along and life changed!