GMC Sierra Denali 2014 Owner's Manual page 324

10-54 Vehicle Care
would mean that the tire's
sidewall is 75 percent as high as
it is wide.
(4) 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.
(5) Rim Diameter Diameter of
:
the wheel in inches.
(6) Service Description
These 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.
A
:
Light Truck (LT-Metric) Tire
(1) 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.
:
(2) Tire Width
number indicates the tire section
width in millimeters from
sidewall to sidewall.
(3) Aspect Ratio
number that indicates the tire
height-to-width measurements.
For example, if the tire size
aspect ratio is 75, as shown in
item 3 of the light truck
The three-digit
:
A two-digit
:
(LT-Metric) tire illustration, it
would mean that the tire's
sidewall is 75 percent as high as
it is wide.
(4) 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.
(5) Rim Diameter Diameter of
:
the wheel in inches.
(6) Load Range Load Range.
:
(7) 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
A
:
The
: