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Tire Size
The following examples show the different parts of
a 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.
(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 means 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.
Passenger (P-Metric) Tire
Light Truck (LT-Metric) Tire
5-60