1.1 This test measures comparative tire durability and treadwear. This test method covers commercially available, over the highway pneumatic tires, new and retreaded, both tube type and tubeless, for use on conventional passenger cars, station wagons, pursuit and emergency high speed and pursuit passenger vehicles, light trucks, medium to heavy trucks, trailers, buses, and similar vehicles normally operated on public roads and highways. This test method also covers commercially available, spe