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:
Conditions in which front passenger’s SRS frontal airbag is activated
The front passenger’s SRS frontal airbag
will be activated for deployment upon
impact when any of the following conditions
are met regarding the front passenger’s
seat.
- When the seat is occ ...
Channel selection
Type A and B audio
Type C audio
Turn the “TUNE/TRACK/CH” dial clockwise to select the next channel and turn the “TUNE/TRACK/CH” dial counterclockwise to select the previous channel. ...
Fuel octane rating
This octane rating is the average of the Research Octane and Motor Octane numbers and is commonly referred to as the Anti Knock Index (AKI).
Using a gasoline with a lower octane rating can cause pers ...
