Alignment was done about 9k miles ago just after the new tires were mounted. I'll check the pressures again, but the tires have worn fairly evenly (slightly more on outside). Much more even compared to the last set prior to allignment. Despite being so worn thr ride is quite still but maybe its because they are on the rear and the fronts are still in good shape, at most 50% worn if that. My best guess is that those 4 trips up the mountain driving pretty spirited just ate them up. I guess pushing a 2.5 ton SUV up hill quickly just was more than they could handle. All 4 trips came after I had rotated the tires. Oh well, it was fun though, just going to cost me a couple hundred bucks.