1997 Chevrolet Astro Owner's Manual - Page 304

1997 Chevrolet Astro Manual

Page 304 highlights

Traction -- A, B, C The traction grades, from highest to lowest, areA, € , 3 and C, and they represent the tire's ability stop on wet to pavement as measured under controlled conditions on specified government test surfaces asphalt and concrete. of A tire marked C may have poor traction performance. Warning: The traction grade assigned to this tire is based on braking (straightahead) traction tests and does not include cornering (turning) traction. 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. Temperature -- A, B, C The temperature grades are A (the highest), B, and C, representing the tire's resistance tothe generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoorlaboratory 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 Wheel Replacement Replace any wheel that is bent, cracked, or badly rusted or corroded. If wheel nuts keep coming loose, the wheel, wheel bolts and wheel nuts should be replaced. If the wheel leaks air, replace it (except some aluminum wheels, which can sometimes be repaired). See your GM dealer if any of these conditions exist. Your dealer will know the kind of wheel you need. 6-48

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Traction
--
A,
B,
C
The traction
grades, from highest to lowest,
are
A,
€3,
and
C,
and
they
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 braking (straightahead) traction tests and does not
include cornering (turning) traction.
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.
Wheel
Replacement
Replace any wheel that is bent, cracked, or badly rusted
or corroded. If wheel nuts keep coming loose, the wheel,
wheel bolts and wheel nuts should be replaced. If the
wheel leaks air, replace
it
(except some aluminum
wheels, which can sometimes be repaired). See your
GM dealer if any
of
these conditions exist.
Your dealer will know the kind of wheel you need.
6-48