SERVICE AND MAINTENANCE
When replacing tires with those not having
a
TPC
Spec.
No
.,
you should use the same
size, load range, and construction type
(bias, bias-belted,
or
radial) as the original
tires on your car. Although it
is
not
generally recommended, some alpha
and
metric size tires can be interchanged (for
size equivalency contact your tire dealer).
A different size or type tire may affect
ride,
. handling, speedometer
/odometer
calibration, vehicle ground clearance, and
tire or tire chain clearance to the body and
chassis.
If
replacing only a single tire, it
should
be· paired
on
the same axle with the
TREAD
WEAR
least worn tire
of
the other three.
INDICATORS
You should replace your tires when
..
.
I. Your tires
are
worn
toa
point where
2/32
inch (1.6 millimetres) or less
tread remains, or cord or fabric
is
exposed.
5-15
To help you detect this, your tires have built-in tread wear
indicators
that
appear between the tread grooves when the tread
is
2/32
inch (1.6 mm)
or
less. When the indicators appear
in
two or
more adjacent grooves
at
three spots around the tire, the tire should
be
replaced.
2. Your tire tread
or
sidewall
is
cracked, cut, or snagged deep enough
to expose the cord
or
fabric.
3.
Your tire has a bump, bulge, or split.
4.
Your tire sustains a puncture, cut, or other injury
that
can't
be
correctly repaired because
of
the size or location
of
theinjury.
Wheel Replacement
Wheels Il)ust be replaced if they become damaged. For example, replace
wheels if wheel
nuts
oftenbecomeJoose or if the wheels
are
bent, cracked,
or heavily rusted. Also replace wheels
that
leak air (except some
aluminum wheels which
can
be repaired -- see your Pontiac Dealer). Do
not use bent wheels which have been straightened,
and
do not use inner
tubes
in
leaking wheels which
are
designed for tubeless tires. Such wheels
may have structural
damage
and could fail without warning. When
replacing wheels for any reason, the new wheels should be equal
in
load
limit, diameter, width, offset, and mounting configurations to those
originally installed on your car.
A wheel
of
the wrong size
or
type may adversely affect wheel and bearing
life, brake cooling, speedometer/odometer calibration, stopping ability,
headlight aim, bumper height, vehicle ground clearance, and tire
or
tire
chain clearance to the body and chassis. Replacement with
"used"
wheels
is
not advised: they may have been subjected to harsh
treatment
or very
high mileage
and
could fail without warning.
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