How to Find & Read A Tire Size | Goodyear Tires
https://www.goodyear.com/en_US/learn/tire-basics/how-to-find-tire-size.html
WEBAspect Ratio. The aspect ratio is the ratio of the height of the tire's cross-section to its width. On our example, 60 means that the height is equal to 60% of the tire's width. 4. Construction. The construction letter tells you how the layers of the tire were put together. "R" stands for radial, which means the layers run radially across the tire.
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