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Consumer Guide to Uniform Tire Quality Grading. July 2007

机译:统一轮胎质量等级的消费者指南。 2007年7月

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The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 would be under one and a half (1 12 ) 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, however, and may depart significantly from the norm due to variations in driving habits, service practices and differences in road characteristics and climate.

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