Chevrolet 2006 Avalanche Spezifikationen PDF herunterladen (Seite 428)

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101

Uniform Tire Quality Grading

Quality grades can be found where applicable on the

tire sidewall between tread shoulder and maximum

section width. For example:

Treadwear 200 Traction AA Temperature A

The following information relates to the system developed

by the United States National Highway Traffic Safety

Administration, which grades tires by treadwear, traction

and temperature performance. (This applies only to

vehicles sold in the United States.) The grades are

molded on the sidewalls of most passenger car tires. The

Uniform Tire Quality Grading system does not apply to

deep tread, winter-type snow tires, space-saver or

temporary use spare tires, tires with nominal rim

diameters of 10 to 12 inches (25 to 30 cm), or to some

limited-production tires.

While the tires available on General Motors passenger

cars and light trucks may vary with respect to these

grades, they must also conform to federal safety

requirements and additional General Motors Tire

Performance Criteria (TPC) standards.

Treadwear

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

a half (1.5) 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.

Traction – AA, A, B, C

The traction grades, from highest to lowest, are AA, A,

B, and C. Those grades represent the tire’s ability

to stop on wet pavement as measured under controlled

conditions on speciﬁed government test surfaces of

asphalt and concrete. A tire marked C may have poor

traction performance. Warning: The traction grade

assigned to this tire is based on straight-ahead braking

traction tests, and does not include acceleration,

cornering, hydroplaning, or peak traction characteristics.

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