Haven't been around them much. I talked to a park ranger with them on a 2011 expedition in 265/70/17s and he said they were ok. They howl pretty loud though. I've got BFG AT's on mine and love them, and all of my parents vehicles and all of my dad's work trucks. They aren't very loud, wear great, and work great for traction. Haven't used them too much in mud, but the few times i did, I didn't get stuck. The tires I have on mine are 10 ply as well, I like them better for the weight of our trucks and all of the rocks in the mountains.