I drive about 75 percent of my miles on the highway. But the 25% I drive off road will shred a regular tire in no time flat. I drive on caliche roads with various size rocks and sometimes huge holes. Most 6 and 8 ply tire i have tried over the years would only last about 20,000-22,000 miles. I put 55,000 on a set of Wrangler SilentArmor 6 ply tires and still had a good 8-10,000 miles left when I got a new truck. I never even had a flat even though I regularly would drive over cactus, mesquites and sharp rocks. As long as Goodyear keeps making these tires, they have a loyal customer.