6.Pro Comp's Xtreme A/T tires measure 35x12.50x20 and are mounted on Pro Comp Alloys Series 8188 20x9 wheels in a gloss black finish. The wheels feature a lifetime warranty against structural defects, and the tires come with a 40,000-mile treadwear warranty. The tires offer excellent grip on wet asphalt and in the dirt, and as a bonus they are extremely quiet on the highway. notice that the tires are marked so that the right wheel gets bolted onto each corner of the truck. This is because our Tundra, like most new vehicles, has air-pressure sensors for each wheel to warn us if the tires are going flat.