Learning about tires begins with some terms and definitions that are
commonly used in all aspects of the tire industry. Knowing and
understanding these terms is the foundation for learning
about tire sizing systems, sidewall nomenclature, and all
the factors that affect tire performance.
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Overall Diameter: The
diameter of the inflated tire without any load. |
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Tread Width: The
portion of the tread design which comes in contact with the road. |
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Section Width:
Linear distance between outside of sidewalss of inflated tire without
any load. |
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Overall Width:
Maximun width in cross-section of unloaded tire including protruding
side ribs and decorations. |
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Section Height:
Distance from rim seat to outer tread surface of an unloaded tire. |
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Nominal Rim Diameter:
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Axis of Rotation:
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Nominal Rim Width:
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Aspect Ratio:
Section Height/Section Width x 100 |
