This is the second set of these tires this truck has had and we have 73,000 miles on this set. We used to rotate every 7500 miles and the tires are great performers, and very quiet. Now down to the tread wear line on rear tires and in rain are very slippery once it gets down to that wear bar. Gonna look at Sears to see if I can get another set. Mine are 6 ply for this HD GMC as that is all Sears would put on.