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GT Radial Smart Program

The GT Radial SMART Program portal provides access to Dealer Resources including Online Training, Marketing Support, Promotional Materials and more. Contact or your GT Radial representative for more information or access.

Smart Program Portal

The Institute of Higher Performance

The Tread Academy is your one-stop, go-to tire education source for all things “rubber” related. Learn more about the academy, and how we can help you become a tire expert.

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Section Width Section Width How to find your width? This three-digit number represents the width of the tire in millimeters (mm), measured from sidewall to sidewall. Since this measure is affected by the width of the rim, the measurement is done when the tire is on its intended rim size.
Aspect Ratio Aspect Ratio How to find your aspect ratio? The aspect ratio is the relationship of a tire's sidewall height to its section width, expressed as a percentage. In this example, the tire sidewall height is approximately 55% of the tire width. The higher the number, the taller the sidewall; the lower the number, the shorter the sidewall.
Rim Diameter Rim Diameter How to find your Rim Diameter? The diameter of the rim in inches.

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