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:
Interior
While the exterior brings the Legacy cruising into 2010, the interior has me
a little worried. It's a nice interior, but the seat upholstery's pattern, which
looks like small flames, reminds me of ...
Automatic transmission
The automatic transmission is electronically controlled and provides 4 forward speeds and 1 reverse speed. Also, it has a manual mode and a SPORT mode.
Do not shift from the “P” or “N” position i ...
Tire pressure monitoring system (TPMS) (U.S.-spec. models)
Type A
Type B
The tire pressure monitoring system provides
the driver with the warning message
indicated by sending a signal from a
sensor that is installed in each wheel
when tire p ...
