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:
Band selection
Press the “SAT” button when the radio is off to turn on the radio. Press the
“SAT” button when the radio is on to select SAT1, SAT2 or SAT3 reception. ...
Load and Speed Rating Descriptions
The load and speed rating descriptions
will appear following the size
designation.
They provide two important facts
about the tire. First, the number
designation is its load index. Second,
...
Deleting device
1. Select the “DELETE AUDIO” (type C
audio)/“Delete Audio Player” (type D
audio) menu. If no devices are registered,
“EMPTY” is displayed and the mode
changes to the Bluetooth® audio setting
...
