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Reading Your Sidewall

January 14th, 2014

1. Tire Specs

This describes the fundamental characteristics of your tire. Size, construction, speed rating and more.

Tire Class - "P"

This designates the type of vehicle the tire fits. P is for passenger metric. Other letters are LT (for light truck), T (for temporary spare) and ST (for special trailers). If your tire has no letter, it signifies that your tire is a euro “metric” size.

Section Width - "225"

This is the width of the tire (or thickness) in millimeters, if measured from a tire’s widest point of its outer sidewall to the widest point of its inner sidewall. Why millimeters? It originated in Europe, which uses the metric system.

Aspect Ratio - "55"

This number (in inches) ind ...[more]

  Posted in: Tires 101