I use to work a second job in a Kelly tire store here a number of years ago. I put a set of off road Kellys on my truck.While they gave excellent traction the rubber was very soft and I managed to get a total of 10k miles out of them before they were wore out. Others who bought them had the same experience. I don't know if they have changed there rubber formula over the years,and maybe they have but I won't take the chance again. Just my opinion.