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:
Vehicle identification
Vehicle identification
1) Vehicle identification number
2) Emission control label
3) Tire inflation pressure label
4) Certification label
5) Vehicle identification number plate
6) Model n ...
Odometer
Type A
Type B
The odometer shows the total distance
that the vehicle has been driven. ...
Auto-dimming function
The auto-dimming function is an anti-glare capability which automatically reduces
glare coming from headlights of vehicles behind you.
By pressing the power button, the autodimming function is togg ...
