A Tool to Find the Tires For You

At That Wheel And Tire Shop, we provide new tires to customers in Bradford, Innisfil, East Gwillimbury and surrounding areas. Use our consumer tire guide below to learn more about Tires:

Tire Type

Designates the type of vehicle the tire is designed to fit: passenger (P), light truck (LT), temporary spare (T), and special trailers (ST). No letter indicates that the tire is euro-metric

 Tire Width

Indicates the width or thickness of the tire in millimeters. Measured from the widest point of a tire’s sidewall to the widest point of its inner sidewall. Also known as Section Width.

Aspect Ratio

Identifies the relationship between the tire’s sidewall height and the tire’s width. Here, the sidewall height is 55% of the width. A lower ratio means a smaller sidewall height, better cornering, and a rougher ride.


Refers to the tire’s internal construction. Nearly every tire on the road has a radial construction, which means the cords of the carcass plies inside the tire radiate directly across one side of the tire to the other. Other letters are D (diagonal) and B (belted).

Wheel Diameter

Indicates the diameter of the wheel the tire is designed to fit. In this case, the tire will fit a wheel with an 18-inch diameter.

Load Index 

Refers to the weight a tire can carry at its maximum rate of inflation. The number corresponds to a load capacity found on a load index chart.

Speed Rating

Designates the maximum safe speed at which the tire is designed to carry a load under certain conditions. The range of speed ratings is from A (lowest) to Y (highest), with the only exception being that H falls between U and V. Surpassing the lawful speed limit is not recommended.


These basic tire traits can help you choose the right tire for your vehicle. It is a lot to take in…That is ok, we can help call us 289-500-3836