The tread wear index experiment was conducted at a location designated by the US government, near San Angelo, Texas, on a 400 mile highway. All experimental vehicles passed through the same lane at the same time to ensure the same experimental conditions. In the experiment, the tread depth was measured every 1288 kilometers, and the same measurement was also performed on the reference tire. After 11592 kilometers of experimentation, compare the wear levels of the experimental tire and the reference tire, and then determine the tire grade based on its relative wear resistance. The wear index mainly measures the tire tread wear performance and service life. The level of wear index is represented by specific numbers. For example, through experiments, using wear 100 as the base (standard), wear 100 can travel 30000 miles, and wear 400 means it can travel 30000 * 4=120000 miles. Of course, it is a grade representation on government designated experimental sites, but in reality, the wear rate of tires is related to usage conditions, driving habits, and other factors. According to the UTQG logo in the United States, tires with a wear index between 160-300 are summer standard types; Tires between 160-200 are high-performance summer models; And those between 300-540 are all-weather standard models. The wear index is only suitable for comparing products from the same manufacturer, and different brands cannot be compared.
