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:
SRS airbag system warning light
When the ignition switch is turned to the “ON” position, the SRS airbag system
warning light will illuminate for approximately 6 seconds and turn off. This shows
the SRS frontal airbag and SRS sid ...
Driving with a trailer
● You should allow for considerably more stopping distance when towing a trailer.
Avoid sudden braking because it may result in skidding or jackknifing and loss of
control.
● Avoid ab ...
