245/45 R20 Firestone Winterhawk 3 variants

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Firestone Winterhawk 3 is a winter tyre made in total of 64 sizes, ranging from R13 to R13 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 245/45 R20 is 90mm wider than the narrowest dimension (155) and 0mm narrower than the widest one (245). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (245mm), which results in 110.25mm sidewall height. In 245/45 R20, Winterhawk 3 usually competes against WinterExpert, which is a tyre from Uniroyal with a rating of 64%, compared to 0% of the Firestone in question.