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:
High beam light bulbs
Right-hand side
1. Use a screwdriver to undo the clips on
the air intake duct, then remove the air
intake duct (right-hand side).
2. Disconnect the electrical connector
from the bulb.
3 ...
Pre-heating or pre-cooling the interior of the
vehicle
Before exiting the vehicle, set the temperature
controls to the desired setting
and operation. After the system starts the
vehicle, the heater or air-conditioning will
activate and heat or coo ...
Dimensions
...
