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:
Driver’s SRS frontal airbag
The driver’s SRS frontal airbag uses a dual stage inflator. The inflator operates
in different ways depending on the severity of impact.
Have the system inspected by your SUBARU dealer immediately ...
Brake fluid level warning
This light illuminates when the brake fluid level has dropped to near the “MIN” level of the brake fluid reservoir with the ignition switch in the “ON” position and with the parking brake fully releas ...
Cruise control indicator light
The cruise control indicator light illuminates when the ignition switch is turned
to the “ON” position and turns off after approximately 3 seconds.
This light illuminates when the “CRUISE” main s ...
