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:
Photosensors
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The mirror has a photosensor attached on
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strikes the mirror, these sensors detect it
an ...
Tripped sensor identification
The security indicator light flashes when the alarm system has been triggered.
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Unleaded gasoline
The neck of the fuel filler pipe is designed to accept only an unleaded gasoline
filler nozzle. Under no circumstances should leaded gasoline be used because it
will damage the emission control sy ...
