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:
Brake system warning light
- Driving with the brake system
warning light on is dangerous.
This indicates your brake system
may not be working properly. If
the light remains illuminated,
have the brakes inspecte ...
Security indicator light
The security indicator light deters potential thieves by indicating that the
vehicle is equipped with an immobilizer system. It begins flashing approximately
60 seconds after the ignition switch ...
Parking on a grade
Always block the wheels under both vehicle and trailer when parking. Apply the
parking brake. You should not park on a hill or slope. But if parking on a hill
or slope cannot be avoided, you shoul ...
