Filter
Top Products
(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.
(D) Tire Identification Number (TIN): The letters
and numbers following DOT code are the Tire
Identification Number (TIN). The TIN shows
the manufacturer and plant code, tire size, and
date the tire was manufactured. The TIN is molded
onto both sides of the tire, although only one
side may have the date of manufacture.
(E) Tire Ply Material: The type of cord and number
of plies in the sidewall and under the tread.
(F) Uniform Tire Quality Grading (UTQG): Tire
manufacturers are required to grade tires based on
three performance factors: treadwear, traction, and
temperature resistance. For more information, see
Uniform Tire Quality Grading on page 473.
(G) Maximum Cold Inflation Load
Limit: Maximum load that can be carried and the
maximum pressure needed to support that
load. For information on recommended tire
pressure see Inflation - Tire Pressure on page 460
and Loading Your Vehicle on page 372.
Tire Size
The following examples show the different parts of
a tire size.
(A) Passenger (P-Metric) Tire: The United
States version of a metric tire sizing system. The
letter P as the first character in the tire size
means a passenger vehicle tire engineered to
standards set by the U.S. Tire and Rim
Association.
Passenger (P-Metric) Tire
456