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:
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For AT models
This light flashes if the vehicle is driven with tires of different diameters
fitted on its wheels or with the air pressure excessively low in any of its tires. ...
Replacing the air cleaner element
Replace the air cleaner element according
to the maintenance schedule in the
“Warranty and Maintenance Booklet”. Under
extremely dusty conditions, replace it
more frequently. It is recommended ...
