Pontiac 1993 Grand Am Owner's Manual page 235

Service & Appearance Care
Tire Inspection and Rotation
(CONT)
1
Rust
or
dirt on
a
wheel, or on
-
b the. parts t o which it i s
htened, ean
fnake
wheel nuts
I
become loose after
a
time, The
wheel could come off and cause an
I
accident. When you change a
wheel, remove any rust
or dirt
from p l k s where the wheel
When lt's Time for New Tires
One way to tell when it's time for new
tires is to check the treadwear
indicators, which will appear when your
tires have only 2/32 inch (1.6
mm)
or
less of tread remaining.
You need a new tire if:
You can see the indicators at three
You can see cord or fabric showing
The tread or sidewall is cracked.
cut.
places around the tire.
through the tire's rubber.
attaches t o
the
vehicle.
~n an
7
-
emergency, you can
use
a
cloth or
I I
or snagged deep enough to show cord
a
p p r towel
ta
do this;
but be
or fabric.
sure
t . a
use
a
scraper or wire
brush
The tire has a bump, bulge or split.
later, if you need t o , to get all the
The tire has a puncture, cut, or other
rust
or dirt off, (See
the
Index
damage that can't be repaired well
undkr h g i i n g
a
2?i?af Ere.)
because of the size or location of the
I
damage.
...
234
Buying New Tires
To find out what kind and size of tires
you need, look at the Tire-Loading
Information label.
The tires installed on your vehicle when
it was new had a Tire Performance
Criteria Specification (TPC Spec)
number on each tire's sidewall. When
you get new tires, get ones with that
same TPC Spec number. That way, your
vehicle will continue to have tires that
are designed to give proper endurance,
handling, speed rating, traction, ride
and other things during normal service
on your vehicle. If your tires have an all-
season tread design, the TPC number
will be followed by a "MS" (for mud
and snow).
If you ever replace your tires with those
not having a TPC Spec number, make
sure they are the same size, load range,
speed rating and construction type (bias,
bias-belted or radial) as your original
I
tires.