Firestone Winterhawk 4 195/55 R20

Firestone Winterhawk 4 is a winter tyre made in total of 102 sizes, ranging from R14 to R14 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 195/55 R20 is 40mm wider than the narrowest dimension (155) and 80mm narrower than the widest one (275). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (195mm), which results in 107.25mm sidewall height. In 195/55 R20, Winterhawk 4 usually competes against Blizzak LM-005, which is a tyre from Bridgestone with a rating of 82%, compared to 56% of the Firestone in question.