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282
uuChecking and Maintaining TiresuDOT Tire Quality Grading (U.S. Vehicles)
Maintenance
DOT Tire Quality Grading (U.S. Vehicles)
The tires on your vehicle meet all U.S. Federal Safety Requirements. All tires
graded for treadwear, traction, and temperature performance according
Transportation (DOT) standards. The following explains
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.
■
Uniform Tire Quality Grading
■
Treadwear
1Uniform 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.
13 CIVIC HYBRID-31TR26100.book 282 ページ ２０１２年１２月１８日 火曜日 午後２時５９分
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