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What does Tread Wear Grade mean?

April 26, 2017grade mean tread wear

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What does Tread Wear Grade mean?

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[Back to top] The Tread Wear Grade is a comparative rating based on the wear of a tire when tested under controlled conditions on a specified government test course. For example, a tire graded 460 would wear 4.6 times as well on the government course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, and may depart significantly from the norm due to variations in driving habits, vehicle conditions, road characteristics and climate. When tires are tested for tread wear they actually accumulate a total of 6400 miles, and the total tread wear is projected by calculation. In addition, the tires are rotated every 800 miles and the vehicle wheel alignment is set to optimal specifications. Tread Wear ratings are set by the tire manufacturers, not the government. Since each company has it’s own standards for the process, ratings are not directly comparable as consumers might think.