Chevrolet 2010 Silverado, Owner'S Manual

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(F) Tire Ply Material
:
The type of cord and
number of plies in the sidewall and under the
tread.
(G) Single Tire Maximum Load
:
Maximum load
that can be carried and the maximum pressure
needed to support that load when used as a
single. For information on recommended tire
pressure see
Inflation - Tire Pressure on page 6 ‑ 73
and Loading the Vehicle on page 5 ‑ 29 .
Tire Size
The following examples show the different parts of
a tire size.
Passenger (P ‐ Metric) Tire
(A) Passenger (P ‐ Metric) Tire
:
The United States
version of a metric tire sizing system. The letter P
as the first character in the tire size means a
passenger vehicle 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 tire illustration, it would
mean that the tire's sidewall is 75 percent as high
as it is wide.
(D) Construction Code
:
A 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) Service Description
:
These characters
represent the load index and speed rating of the
tire. The load index represents the load carry
capacity a tire is certified to carry. The speed
rating is the maximum speed a tire is certified to
carry a load.
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