Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width.
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Uniform Tire Quality Grading For example: Treadwear 200 All passenger car tires must conform to Federal Safety Requirements in addition to these grades. |
DOT Tire Quality Grading (U.S. Vehicles)
TreadwearHonda Civic Owners Manual. Treadwear
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 wear one and one-half (1 1/2) times as well on the
government course as a tire graded 100. The relati ...