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:
SRS airbag system monitors
Type A
Type B
A diagnostic system continually monitors
the readiness of the SRS airbag system
(including front seatbelt pretensioners)
while the vehicle is being driven. The
SRS airbag s ...
Brake pad and lining
While maintaining a speed of 30 to 40 mph (50 to 65 km/h), step on the brake
pedal lightly. Repeat this five or more times. ...
Examples of the types of accidents in which the SRS curtain airbag is unlikely
to deploy.
Legacy models
1) The vehicle is involved in an oblique side-on impact.
2) The vehicle is involved in a side-on impact in an area outside the vicinity of
the passenger compartment.
3) The vehicl ...
