Tire Sidewall Labeling - Buick LaCrosse 2011 Owner's Manual

10-48 Vehicle Care
See your dealer for details
regarding winter tire availability
and proper tire selection. Also, see
Buying New Tires on page 10 64.
If using snow 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 the 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 winter
tires with a lower speed rating are
chosen, 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,
I n f o r ma t i o n P r o v i d e d b y :
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.