I lost another tire over the weekend on a graded dirt road in Utah's west desert. A rock tore through the center of the tread. This is the second failure of this type I have had with the KOs. I otherwise like them, but this is pissing me off. I am considering going to a 16" wheel in order to use the 315/75R16 Goodyear Duratrac which, I believe, is a 10 ply rated tread vs. 6 (???) on my current 35x12.5R15 KOs. Tire gurus please chime in before I spend a fortune on tires and wheels.