Tire Terminology And Definitions - GMC 2011 Acadia Owner's Manual

10-42 Vehicle Care
(E) Rim Diameter Diameter of
:
the wheel in inches.
(F) Service Description
characters represent the load
index and speed rating of the
tire. The load index represents
the load carrying capacity a tire
is certified to carry. 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 psi (pounds per
square inch) or kPa (kilopascal).
Accessory Weight
combined weight of optional
accessories. Some examples
These
:
of optional accessories are,
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
:
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 45.
Curb Weight
motor vehicle with standard and
optional equipment including
the maximum capacity of fuel,
oil, and coolant, but without
passengers and cargo.
A pneumatic
:
The
:
The weight of a
: