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(G) Maximum Cold Inflation Load
Limit: Maximum load that can be carried and the
maximum pressure needed to support that
load. For information on recommended tire
pressure see Inflation - Tire Pressure on page 304
and Loading Your Vehicle on page 242.
Tire Size
The following illustration shows, an example of, a
typical passenger car tire size.
(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 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: The service description
indicates the load range and speed rating of a
tire. The load index can range from 1 to 279.
Speed ratings range from A to Z.
300