Subaru WRX & WRX STI Manuals 2015 WRX & WRX STI Owner's Manual | Page 485

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Consumer information and Reporting safety defects/For U.S.A.

For U.S.A.
The following information has been
compiled according to Code of
Federal Regulations “Title 49, Part
575”.

Tire information
& Tire labeling
Many markings (e.g. Tire size, Tire
Identification Number or TIN) are
placed on the sidewall of a tire by
tire manufacturers. These markings
can provide you with useful information on the tire.
! Tire size

Your vehicle comes equipped with
P-Metric tire size. It is important to
understand the sizing system in
selecting the proper tire for your
vehicles. Here is a brief review of
the tire sizing system with a breakdown of its individual elements.
! 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
! Load and Speed Rating Descriptions

The load and speed rating descriptions will appear following the size
designation.
They provide two important facts
about the tire. First, the number
designation is its load index. Second, the letter designation indicates
the tire’s speed rating.