Overview of Tire Quality Grading Standards
Uniform Tire Quality Grading Standards are U.S. government specifications. Their purpose is to provide drivers with uniform reliable information on tire performance data.
Tire manufacturers have to grade tires using three performance factors: 1 tread wear grade, 2 traction grade and 3 temperature grade. These regulations do not apply to Canada. Nevertheless, all tires sold in North America are provided with the corresponding quality grading markings on the sidewall of the tire.
Where applicable, the tire grading information can be found on the tire sidewall between the tread shoulder and maximum tire width.
Example:
• Treadwear grade:
200 • Traction grade:
AA • Temperature grade:
A
All passenger car tires must conform to the statutory safety requirements in addition to these grades.
The actual values for tires are vehiclespecific and may deviate from the values in the illustration.
See also:
Important safety notes
Xenon bulbs
DANGER
Xenon bulbs carry a high voltage. You can get
an electric shock if you remove the cover of
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...
Selecting, mounting and replacing
tires
• Only mount tires and wheels of the same
type and make.
• Only mount approved tires of the correct
size onto the wheels.
• Tires are supplied with a protective layer
from the factory. Break in n ...
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