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:
2.0-L DOHC engines on the 2.0X and 2.0XS
Fuel economy has been improved with the redesigned DOHC cylinder head, as
well as through optimization of the compression ratio and reduction of the
volume of the combustion chamber.
Low-end and ...
Operation
The SRS side airbag and SRS curtain airbag can function only when the ignition
switch is in the “ON” position.
The driver’s and front passenger’s SRS side airbags and SRS curtain airbags deploy
...
Safety
The 2010 Legacy is one of 27 cars to be named a 2010 Top Safety Pick by the
Insurance Institute for Highway Safety. To earn this award, a car must earn the
top score of Good in crash tests and hav ...
