Are Summit tires any good for a truck or SUV?

How the AT02's load range and tread actually work

Start with the fitment, because that's where a tire either does the job or becomes an expensive mistake. The AT02 comes in LT275/65R20, a load range E carcass rated to 3750 pounds and a load index of 126. That E rating means reinforced plies, stiffer sidewalls, and the ability to run higher pressure, up to 80 psi, which is what you actually need if the truck tows or hauls anything with weight behind it. A lighter-duty tire in the same size would flex more under that load and wear unevenly at the shoulders. The tread itself is doing two jobs at once. The aggressive non-directional pattern with scalloped shoulders bites into loose surfaces, dirt, gravel, light mud, the same way a boot tread grips scree. Sidewall biters extend that grip past the tread face, which matters once you're off pavement and the sidewall is doing work the tread can't reach. Built-in stone ejectors clear debris out of the grooves as the tire rotates, so the tread doesn't pack solid and go slick the way a cheap all-terrain tire will after a few miles of wet dirt. Then there's the Three Peak Mountain Snowflake rating, which isn't a sticker, it's a certified severe-snow traction standard the tire has to pass. That separates a real winter-capable all-terrain from one that just looks aggressive and folds on ice. Put it together and you get a tire built for load, terrain, and weather, backed by a 50,000 mile tread warranty that tells you how long the compound is expected to last.