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:
Maximum permissible inflation pressure
The maximum cold inflation pressure
to which this tire may be
inflated. For example, “300 kPa
(44 PSI) MAX. PRESS” ...
Maximum allowable speeds
The following tables show the maximum
speeds that are possible with each different
gear.
Never exceed the speed limit listed in the
following table for each gear position
except for brief acc ...
Using the cover
Using the cover
To extend the cover, pull the end of the
cover out of the housing, then insert its
hooks into the catches as shown. To
rewind it, unhook it from the catches and
it will re ...
