Tire Terminology And Definitions - Hummer H2 2010 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
:
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.
This means the combined
Cold Tire Pressure
:
in 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 6 66 .
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 5 40 .
GAWR FRT Gross Axle Weight Rating for the
:
front axle. See Loading the Vehicle on page 5 40 .
GAWR RR Gross Axle Weight Rating for the rear
:
axle. See Loading the Vehicle on page 5 40 .
The amount of air pressure
6-63