Tire Terminology And Definitions - GMC 2012 Sierra Series Owner's Manual

(E) Rim Diameter Diameter of
:
the wheel in inches.
(F) Load Range Load Range.
:
(G) Service Description
service description indicates the
load index and speed rating of a
tire. If two numbers are given as
in the example, 120/116, then
this represents the load index for
single versus dual wheel usage
(single/dual). The speed rating is
the maximum speed a tire is
certified to carry a load.
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
The
:
automatic transmission, power
steering, power brakes, power
windows, power seats, and air
conditioning.
Aspect Ratio
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.
I n f o r ma t i o n P r o v i d e d b y :
The Bias Ply Tire
:
in which the plies are laid at
alternate angles less than
90 degrees to the centerline of
the tread.
Cold Tire Pressure
amount of air pressure in a tire,
measured in kPa (kilopascal)
The relationship or psi (pounds per square inch)
:
before a tire has built up heat
from driving. See Tire Pressure
on page 10 62.
Curb Weight
motor vehicle with standard and
optional equipment including the
maximum capacity of fuel, oil,
and coolant, but without
passengers and cargo.
Vehicle Care 10-59
A pneumatic tire
:
The
:
The weight of a
: