Tire Terminology And Definitions - GMC 2009 Yukon XL Owner's Manual

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 pounds per
square inch (psi) or kilopascal (kPa).
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.
Cold Tire Pressure
:
a tire, measured in pounds per square inch (psi) or
kilopascals (kPa) before a tire has built up heat
from driving. See Inflation - Tire Pressure on
page 5-70.
Curb Weight The weight of a motor vehicle with
:
standard and optional equipment including the
maximum capacity of fuel, oil, and coolant,
but without passengers and cargo.
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 Loading the Vehicle on page 4-33.
GAWR FRT Gross Axle Weight Rating for the
:
front axle. See Loading the Vehicle on page 4-33.
The amount of air pressure in
5-67