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:
Low fuel warning light
The low fuel warning light illuminates when the fuel tank is nearly empty. It
only operates when the ignition switch is in the “ON” position. When this light
illuminates, fill the fuel tank immedi ...
Tire pressure monitoring system (TPMS) (if equipped)
The tire pressure monitoring system provides the driver with a warning message
by sending a signal from a sensor that is installed in each wheel when tire pressure
is severely low.
The tire pre ...
Recommended spark plugs
Refer to “Electrical system” F12-8. ...
