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
to
the
gencration
of
heat and its ability to dissipate heat
when
tested undcr
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.
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
in
combination.
c;m ca~~se 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
~epl~e
;my
wheel that is bent. cracked,
or
badly rusted
01-
corrocled.
If
wheel n~~ts 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 cm sometimes be repaired). See
your
GM
dcalcr
if
any
of’
these conditions
exist.
6-46
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