Tire Sidewall Labeling - Saturn 2008 Astra Owner's Manual

9-40 Vehicle Service and Care
See your dealer/retailer for details
regarding winter tire availability
and proper tire selection. Also, see
Buying New Tires on page 9-54.
If you choose to use winter tires:
•
Use tires of the same brand and
tread type on all four wheel
positions.
•
Use only radial ply tires of the
same size, load range, and
speed rating as your original
equipment tires.
Winter tires with the same speed
rating as the original equipment tires
may not be available for H, V, W,
Y and ZR speed rated tires.
If you choose winter tires with a
lower speed rating, never exceed
the tire's maximum speed capability.

Tire Sidewall Labeling

Useful information about a
tire is molded into its sidewall.
The examples below show
a typical passenger vehicle
tire and a compact spare
tire sidewall.
Passenger (P-Metric) Tire
Example
(A) Tire Size The tire size is
:
a combination of letters and
numbers used to define a
particular tire's width, height,
aspect ratio, construction
type, and service description.
See the "Tire Size" illustration
later in this section for more
detail.
(B) TPC Spec (Tire
Performance Criteria
Specification) Original
:
equipment tires designed to
GM's specific tire performance
criteria have a TPC specification
code molded onto the sidewall.
GM's TPC specifications meet
or exceed all federal safety
guidelines.
(C) DOT (Department of
Transportation) The
:
Department of Transportation
(DOT) code indicates that the tire
is in compliance with the U.S.
Department of Transportation
Motor Vehicle Safety Standards.