Tire Terminology And Definitions - Chevrolet Avalanche 2012 Owner's Manual

10-50 Vehicle Care
is certified to carry. The speed
rating is the maximum speed a
tire is certified to carry a load.
Light Truck (LT Metric) Tire
(A) Light Truck (LT Metric)
Tire The United States version
:
of a metric tire sizing system.
The letters LT as the first two
characters in the tire size mean
a light truck tire engineered to
standards set by the U.S. Tire
and Rim Association.
(B) Tire Width The three digit
:
number indicates the tire section
width in millimeters from
sidewall to sidewall.
(C) Aspect Ratio A two digit
:
number that indicates the tire
height to width measurements.
For example, if the tire size
aspect ratio is 75, as shown
in item C of the light truck
(LT Metric) tire illustration, it
would mean that the tire's
sidewall is 75 percent as high
as it is wide.
(D) Construction Code
letter code is used to indicate
the type of ply construction in
the tire. The letter R means
radial ply construction; the
letter D means diagonal or bias
ply construction; and the letter B
means belted bias ply
construction.
(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
I n f o r ma t i o n P r o v i d e d b y :
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
A
:
Air Pressure
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
steering, power brakes, power
The
:
windows, power seats, and air
conditioning.
Aspect Ratio
of a tire's height to its width.
The amount of
:
The
:
The relationship
: