Subaru 2007 Impreza WRX User Manual download pdf (Page 342)

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北米Model "A1920BE-B" EDITED: 2006/ 9/ 19

13-2 Consumer information and Reporting safety defects

For U.S.A.

The following information has been

compiled according to Code of Fed-

eral 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 se-

lecting the proper tire for your vehi-

cles. 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 in-

formation 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 Descrip-

tions

The load and speed rating descrip-

tions will appear following the size

designation.

They provide two importa nt facts

about the tire. First, the number

designation is its load index. Second,

the letter designation indicates the

tire’s speed rating.

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Subaru 2007 Impreza WRX User Manual Page 342

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