I just returned to Kentucky from Alaska. Put on a new set of K60's before I left. Actually, the set had 800+ miles on them before I started for Alaska. I ran 33F/42R and the front still has plenty of tread depth. The rear is squared off pretty bad but still has tread left. Not much interstate going north, but several days of 80+ MPH on the slab coming home. Tires worked well on gravel once I got a feel for it. The front was a bit slippy in the wet road construction, but as Ron pointed out they do better running a bit faster(not as fast as Ron). The front held the pavement well, but the rear tried coming around if I got too aggressive in the corners. Total mileage on this trip is over 11,000 miles. The tires have about 12,000 or so. I'll have to check recorded mileage to be exact. I'll put a new rear on next week.