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:
Use of engine braking
Remember to make use of engine braking
in addition to foot braking. When descending
a grade, if only the foot brake is used,
the brakes may start working improperly
because of brake fluid over ...
Information display
Information display
1) Outside temperature indicator
2) Fuel consumption indicator
With the ignition switch in the “ON”
position, the outside temperature and fuel
consumption are indicated ...
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.
...
