Loading ...
Loading ...
Loading ...
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.
Temperature
-
A,
B,
C
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 Vehicle 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, underinflation, or
excessive loading, either separately or in combination,
can cause heat buildup and possible tire failure.
Wheel
Alignment and
Tire
Balance
The wheels on your vehicle were aligned and balanced
carefully at the factory
to
give you the longest tire life
and best overall performance.
Scheduled wheel alignment and wheel balancing are
not needed. However,
if
you notice unusual tire wear or
your vehicle pulling one way
or
the other, the alignment
may need to be reset. If you notice your vehicle
vibrating when driving on a smooth road, your wheels
may need to be rebalanced.
5-58
Loading ...
Loading ...
Loading ...