P Metric
With the P-Metric system, Section Width is measured in millimeters.
To convert millimeters into inches, divide by 25.4. The Aspect Ratio (Section Height divided by Section Width) helps provide more dimensional information about the tire size.
Example:

(1) P = Certain tire type used on light duty vehicles such as passenger
cars
(2) Section Width in millimeters
(3) Aspect Ratio (= section height 7 section width).
(4) R = Radial Construction
(5) Rim diameter in inches
See also:
Bi-level heating
Bi-level heating
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Tire rotation
Vehicles equipped with 4 non-unidirectional tires
1) Front
Vehicles equipped with unidirectional tires
1) Front
Tire wear varies from wheel to wheel. To maximize the life of each tire and ensure t ...
Key replacement
Your key number plate and security ID plate will be required if you ever need
a replacement key made. Any new key must be registered for use with your vehicle’s
immobilizer system before it can be ...
