Tire Terminology And Definitions - GMC Yukon Denali 2015 Owner's Manual

10-48 Vehicle Care
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 kPa (kilopascal)
or psi (pounds per square inch).
Accessory Weight
:
combined weight of optional
accessories. Some examples of
optional accessories are
automatic transmission, 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 between the plies and the
tread. Cords may be made from
steel or other reinforcing
materials.
Bead
:
steel wires wrapped by steel
cords that hold the tire onto
the rim.
Bias Ply Tire
in which the plies are laid at
alternate angles less than
90 degrees to the centerline of
the tread.
The
Cold Tire Pressure
amount of air pressure in a tire,
measured in kPa (kilopascal)
or psi (pounds per square inch)
before a tire has built up heat
from driving. See Tire Pressure
on page 10-50.
Curb Weight
motor vehicle with standard and
optional equipment including the
maximum capacity of fuel, oil,
and coolant, but without
passengers and cargo.
The tire bead contains
A pneumatic tire
:
The
:
The weight of a
:
DOT Markings A code molded
:
into the sidewall of a tire
signifying that the tire is in
compliance with the U.S.
Department of Transportation
(DOT) Motor Vehicle Safety
Standards. The DOT code
includes the Tire Identification
Number (TIN), an alphanumeric
designator which can also
identify the tire manufacturer,
production plant, brand, and
date of production.
GVWR Gross Vehicle Weight
:
Rating. See Vehicle Load Limits
on page 9-14.
GAWR FRT Gross Axle Weight
:
Rating for the front axle. See
Vehicle Load Limits on
page 9-14.
GAWR RR Gross Axle Weight
:
Rating for the rear axle. See
Vehicle Load Limits on
page 9-14.