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:
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. ...
Towing and tie-down hooks/holes
The towing hooks should be used only in an emergency (e.g., to free a stuck vehicle
from mud, sand or snow).
CAUTION
● Use only the specified towing hooks and tie-down hooks/holes. Never use ...
