GoodYear UltraGrip Performance 3 is a winter tyre made in total of 89 sizes, ranging from R14 to R14 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/40 R20 is 80mm wider than the narrowest dimension (175) and 10mm narrower than the widest one (265). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (255mm), which results in 102mm sidewall height. In 255/40 R20, there is only one possible speed index for GoodYear UltraGrip Performance 3 - "W", which is good for speeds up to 270 km/h.
Relevant tyre tests in same or similiar dimension (255/40 R20)
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