Dot tire quality grading (u.s. vehicles) – HONDA 2013 CR-Z User Manual
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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)
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Uniform Tire Quality Grading
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Treadwear
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Uniform Tire Quality Grading
13 CR-Z-31SZT6200.book 256 ページ ２０１２年１０月２５日 木曜日 午後９時９分
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2013 CR-Z
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
houlder 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)
imes 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.
For example:
Treadwear 200
Traction AA
Temperature A
All passenger car tires must conform to Federal
Safety Requirements in addition to these grades.
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