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:
When the following messages are displayed
If one of the following messages is displayed while operating the CD player,
determine the cause based on the following information. If you cannot clear those
messages, please contact your SUBARU ...
Gross Axle Weight (GAW) and Gross Axle Weight Rating
(GAWR)
Gross Axle Weight
The total weight applied to each axle
(GAW) must never exceed the Gross Axle
Weight Rating (GAWR). The front and rear
GAWs can be adjusted by relocating
passengers and l ...
Before driving your vehicle
Before entering the vehicle, remove any snow or ice from your shoes because that
could make the pedals slippery and driving dangerous.
While warming up the vehicle before driving, check that the ac ...
