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:
Maintenance schedule
The scheduled maintenance items required
to be serviced at regular intervals
are shown in the “Warranty and Maintenance
Booklet”.
For details of your maintenance schedule,
read the separate “ ...
Example of the type of accident in which the SRS side airbag will most
likely deploy.
A severe side impact near the front seat
activates the SRS side airbag and SRS
curtain airbag. ...
Recommended shifting speeds
The best compromise between fuel economy and vehicle performance during normal
driving is ensured by shifting up at the speeds listed in the following table.
...
