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1. Tire Width: Also called Section Width, this is the width of the tire (or thickness) in millimeters.
2. Aspect Ratio: This identifies the tire’s aspect ratio, which is the relationship of the tire’s sidewall height to the tire’s width.
3. Construction: This is the tire’s internal construction, which is “radial.” Almost every tire on the road has radial construction.
4. Wheel Diameter: This number (in inches) indicates that the tire is designed to fit on a wheel with a 18-inch diameter.
5. Load Index: This indicates how much weight the tire is certified to carry a maximum safe inflation.
6. Speed Rating: This indicates the maximum safe speed at which a tire is certified to carry a load under specified conditions.