Tire terminology and definitions, Tire terminology and, Definitions -55 – GMC 2011 Savana User Manual
Page 321

Black plate (55,1)
GMC Savana Owner Manual - 2011
Vehicle Care
10-55
Tire Pressure on page 9‑12
and Vehicle Load Limits on
page 9‑12.
(D) 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.
(E) 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.
(F) Tire Ply Material
:
The type
of cord and number of plies in
the sidewall and under the tread.
(G) Single Tire Maximum
Load
:
Maximum load that can
be carried and the maximum
pressure needed to support that
load when used as a single. For
information on recommended
tire pressure see Tire Pressure
on page 10‑58 and Vehicle Load
Limits on page 9‑12.
Tire Terminology and
Definitions
Air Pressure
:
The amount
of air inside the tire pressing
outward on each square inch
of the tire. Air pressure is
expressed in psi (pounds per
square inch) or kPa (kilopascal).
Accessory Weight
:
This
means the combined weight
of optional accessories.
Some examples of optional
accessories are, automatic
transmission, power steering,
power brakes, power
windows, power seats,
and air conditioning.
Aspect Ratio
:
The relationship
of a tire's height to its width.
Belt
:
A rubber coated layer of
cords that is located between
the plies and the tread. Cords
may be made from steel or other
reinforcing materials.
Bead
:
The tire bead contains
steel wires wrapped by steel
cords that hold the tire onto
the rim.
Bias Ply Tire
:
A pneumatic tire
in which the plies are laid at
alternate angles less than
90 degrees to the centerline of
the tread.