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Traction
--
A, B, C
The tmction grades, from highest
to
lowest. are
A,
B. 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 perf'ormance.
Wxning: The traction grade assigned to this tire is
based
on braking (straight ahead) traction tests and does not
include cornering (tuning) traction.
Temperature
--
A, B, C
The temperature grades are A (,the highest), B, and C.
representing the tire's resistance
t o
the gencration of
heat and its ability to dissipate heat when tested undcr
controlled conditions o n 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
t o
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.
Warnin?: Thc ten~perat~u-e pxde
for this tire is
estnblishcd for a tire that is properly intlated and
not
overloaded. Excessive speed. underinflation, or
excessive loading. either separatcly or i n combination.
c;m c a ~ ~ s e
heat buildup md possible tire failure.
Wheel Alignment and Tire Balance
The wheels
on
your vehicle were aligned and balanced
care1'uIly at the factory to give you the longest tire life
and best overdl performance.
lee1 Replacement
~ e p l ~ e
;my wheel that is bent. cracked, or badly rusted
01-
corrocled. I f wheel n ~ ~ t s
keep coming loose. the wheel,
wheel bolts and wheel nuts should be 1-eplacec1. If
the
wheel leaks air, replace
it
(except some aluminum
wheels. which c m sometimes be repaired). See your
G M dcalcr if
a n y
o f '
these conditions
exist.
6-46
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