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:
ON
This is the normal operating position after
the engine is started. ...
AT and CVT models
CAUTION
If you restart the engine while the vehicle is moving, shift the select lever
into the “N” position. Do not attempt to place the select lever of a moving vehicle
into the “P” position.
1 ...
Maintenance tips
Some clips and fender linings must be removed before replacing the air cleaner
elements or specific bulbs. ...
