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:
Child safety
WARNING
● Never hold a child on your lap or in your arms while the vehicle is moving.
The passenger cannot protect the child from injury in a collision, because the child
will be caught bet ...
Warning and indicator lights
...
Aluminum wheels
Aluminum wheels can be scratched and damaged easily. Handle them carefully to
maintain their appearance, performance, and safety.
● When any of the wheels is removed and replaced for tire rot ...
