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:
PTY (Program type) group tuning (only FM reception)
Press the “PTY/CAT” button to change to the PTY selection mode. At this time,
the PTY group that you are currently listening to will be displayed for 10 seconds.
In PTY selection mode, “PTY SEL” ...
Channel selection by operating the dial
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. ...
Brake booster
The brake booster uses engine manifold vacuum to assist braking force. Do not
turn off the engine while driving because that will turn off the brake booster,
resulting in poor braking power.
The ...
