Uniform Tire Quality Grading; Treadwear 200; Temperature A- Page 621

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Checking and Maintaining Tires

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DOT Tire Quality Grading (U.S. Vehicles)

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DOT Tire Quality Grading (U.S. Vehicles)

The tires on your vehicle meet all U.S. Federal Safety 
Requirements. All tires are also graded for treadwear, traction, 
and temperature performance according to Department of 
Transportation (DOT) standards. The following explains these 
gradings.

Quality grades can be found where applicable on the tire sidewall 
between tread shoulder and maximum section width.

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 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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Uniform Tire Quality Grading

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Treadwear

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Uniform Tire Quality Grading

For example:

Treadwear 200
Traction AA
Temperature A

All passenger car tires must conform 
to Federal Safety Requirements in 
addition to these grades.