Page 247 - Honda Civic

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DOT Tire Quality Grading (U.S. Vehicles)

The tires on your vehicle meet all Treadwear Traction ʵ AA, A, B, C
U.S. Federal Safety Requirements. The treadwear grade is a compara- The traction grades, from highest to
All tires are also graded for tive rating based on the wear rate of lowest, are AA, A, B, and C. Those
treadwear, traction, and temperature the tire when tested under controlled grades represent the tire’s ability to
performance according to conditions on a specified government stop on wet pavement as measured
Department of Transportation test course. For example, a tire under controlled conditions on
(DOT) standards. The following graded 150 would wear one and one- specified government test surfaces
explains these gradings. half (1 1/2) times as well on the of asphalt and concrete. A tire
government course as a tire graded marked C may have poor traction
Uniform Tire Quality Grading 100. The relative performance of performance.
Quality grades can be found where tires depends upon the actual condi-
applicable on the tire sidewall tions of their use, however, and may Warning: The traction grade
between the tread shoulder and the depart significantly from the norm assignedto thistireisbased on
maximum section width. For due to variations in driving habits, straight-ahead braking traction tests,
example: service practices, and differences in and does not include acceleration,
Treadwear 200 road characteristics and climate. cornering, hydroplaning, or peak
Traction AA traction characteristics.
Temperature A
All passenger car tires must conform
to Federal Safety Requirements in
addition to these grades.

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