1997 Chevrolet K1500 (Silverado) Z71 four-wheel drive. The tires perform very well and offer good traction on gravel and dirt. I'm not an extreme off-roader, but for what I've thrown at them I have been satisfied with the performance. In the winter time they performed better than I expected and maintained decent traction in deep snow and ice. And using four-wheel drive, I feel safe driving in extreme snowy conditions. The only thing better would be snow tires of course, but I was satisfied with the performance of these tires. On the dry highway I expected the tires to be noisy and rough, as most off-road type tires are on pavement. But nope, the noise levels were in the lower range and handling is great. I would say that these do almost as good as a BF Goodrich KO2 and would expect the next level up tire from Kelly (the Kelly Safari) to be on par with the KO2. For a more budget-friendly off road tire, I would recommend purchasing the Edge A/T. The only downside would be that they do seem to be wearing slightly faster than what I would normally expect, but I do believe that they will last at least 40,000 miles.