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
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 charac-
teristics and climate.
Traction Grades
The Traction grades, from highest to lowest, are AA, A, B,
and C. These 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 perfor-
mance.
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 Grades
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
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Содержание 2009 Grand Cherokee
Страница 1: ...GRAND CHEROKEE 2009 owner s manual 9 9 08 8 33 17 AM ...
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Страница 9: ...INTRODUCTION 7 1 ...
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Страница 107: ...UNDERSTANDING THE FEATURES OF YOUR VEHICLE 105 3 ...
Страница 108: ...106 UNDERSTANDING THE FEATURES OF YOUR VEHICLE ...
Страница 109: ...UNDERSTANDING THE FEATURES OF YOUR VEHICLE 107 3 ...
Страница 184: ...INSTRUMENT CLUSTER GASOLINE ENGINE 182 UNDERSTANDING YOUR INSTRUMENT PANEL ...
Страница 185: ...INSTRUMENT CLUSTER DIESEL ENGINE UNDERSTANDING YOUR INSTRUMENT PANEL 183 4 ...
Страница 270: ...268 UNDERSTANDING YOUR INSTRUMENT PANEL ...
Страница 275: ...Operating Tips Chart UNDERSTANDING YOUR INSTRUMENT PANEL 273 4 ...
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Страница 336: ...334 STARTING AND OPERATING ...
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Страница 499: ...INDEX 10 ...
Страница 521: ...Chrysler LLC 81 326 0954 Second Edition Printed in U S A 150920 GrCherokee indd 1 ...