I currently have 35k on these and looks to be easily past 40k. This is on a heavily offroaded tundra crewmax. These tires seem to have better quality and thought put into them compared to other tires in this category. There are small "spikes" in between each tread lug all over the tire which improves traction in snow, dirt and whatever else you come across. Think winter tread on the carcass of the tire. Cool concept. Just ordered my second set because I'm in love with these. They just work (and last!) Great traction. They are a little firm but they are 10 ply. Never had issues airing down. Very tough sidewall. Never had punctures on the trail. There may be better tires out there but for the price, this is the pinnacle. I don't write reviews on anything unless I really want people to know a quality product. Thanks simple tire!