Chevrolet 2003 Malibu Spezifikationen Seite 266

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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,
cnrnering,
hyrjronlanin9,
or
peak
traction characteristics.
5-57
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