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:
Passive arming
When passive arming mode has been
programmed by the dealer, arming of the
system is automatically accomplished
without using the remote transmitter. Note
that in this mode, DOORS MUST BE
MAN ...
When “CHECK DISC” is displayed
Press the eject button to unload the discs.
Check that the disc is not damaged or scratched, and also check that the disc is inserted correctly. This message may appear when using some CD-RW discs.
...
Foreword
Congratulations on choosing a SUBARU vehicle. This Owner’s Manual has all the
information necessary to keep your SUBARU in excellent condition and to properly
maintain the emission control system ...
