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 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 ...
Turbo models
Turbo models
1) Power steering oil pump pulley
2) Front side belt
3) Alternator pulley
4) Air conditioner compressor pulley
5) Rear side belt
6) Crank pulley
A) 22 lbf (98 N, 10 kgf)
...
Wheel replacement
When replacing wheels due, for example, to damage, make sure the replacement
wheels match the specifications of the wheels that are fitted as standard equipment.
Replacement wheels are available f ...
