Pontiac 2004 Vibe User Manual
Page 273
A. Tire Size
B. Department of Transportation (DOT)
C. Tire Identification Number (TIN)
D. Tire Ply Material
E. Uniform Tire Quality Grading (UTQG)
F. Maximum Cold Inflation Load Limit
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.
Department of Transportation (DOT): The
Department of Transportation (DOT) code indicates that
the tire is in compliance with the U.S. Department of
Transportation Motor Vehicle Safety Standards.
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.
Tire Ply Material: The type of cord and number of plies
in the sidewall and under the tread.
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 5-72.
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
Pressure on page 5-67 and Loading Your Vehicle on
page 4-32.
5-63