Tire Sidewall Labeling
Useful information about a tire is molded into its
(A) Tire Size
: The tire size is a combination of
letters and numbers used to de?ne 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
: Original equipment tires designed
to GM?s speci?c tire performance criteria have a
TPC speci?cation code molded onto the sidewall.
GM?s TPC speci?cations meet or exceed all federal
(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
(D) Tire Identi?cation Number (TIN)
: The letters
and numbers following the DOT code are the Tire
Identi?cation 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.
Passenger Car Tire Example