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:
ABS (Anti-lock Brake System)
WARNING
Always use the utmost care in driving – overconfidence because you are driving
with an ABS equipped vehicle could easily lead to a serious accident.
CAUTION
● The ABS system does no ...
Tire replacement
The wheels and tires are important and integral parts of your vehicle’s design;
they cannot be changed arbitrarily. The tires fitted as standard equipment are optimally
matched to the characterist ...
Mirrors
Always check that the inside and outside mirrors are properly adjusted before
you start driving. ...
