Vehicle Care; Temperature A; Treadwear 200 Traction AA- Page 229

2019 Buick Cascada Owner Manual

Model Year
2014 Dodge Charger SRT Owner Manual

Table of Contents

01-In Brief_en_US
03-Seats and Restraints_en_US
05-Instruments and Controls_en_US
09-Driving and Operating_en_US
10-Vehicle Care_en_US
Vehicle Care
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Buick Cascada Owner Manual (GMNA-Localizing-U.S.-12461774) - 2019 -

CRC - 3/26/18

228

Vehicle Care

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

All Passenger Car Tires Must
Conform to Federal Safety
Requirements In Addition To
These Grades.

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
one-half (1½) 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

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.

Temperature

The temperature grades are A
(the highest), B, and C,
representing the tire's resistance
to the generation of heat and its
ability to dissipate heat when
tested under controlled
conditions on a specified indoor
laboratory test wheel. Sustained
high temperature can cause the
material of the tire to degenerate
and reduce tire life, and
excessive temperature can lead
to sudden tire failure. The grade
C corresponds to a level of
performance which all
passenger car tires must meet
under the Federal Motor Safety
Standard No. 109. Grades B and
A represent higher levels of
performance on the laboratory
test wheel than the minimum
required by law. Warning: The
temperature grade for this tire is
established for a tire that is
properly inflated and not
overloaded. Excessive speed,

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  • 9. Grades B and A represent higher levels of performance on the laboratory test wheel than the minimum required by law.

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