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:
Clutch pedal (MT models)
Check the clutch pedal free play and reserve distance according to the maintenance
schedule in the “Warranty and Maintenance Booklet”. ...
Clutch pedal (MT models)
Check the clutch pedal free play and reserve distance according to the maintenance schedule in the “Warranty and Maintenance Booklet”. ...
Example of the type of accident in which the SRS curtain airbag will
basically not deploy.
The SRS curtain airbags are not basically
designed to deploy if the vehicle pitches
end over end. ...
