GoodYear Eagle Touring 255/45 R20

GoodYear Eagle Touring is a summer tyre made in total of 21 sizes, ranging from R19 to R19 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/45 R20 is 30mm wider than the narrowest dimension (225) and 50mm narrower than the widest one (305). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (255mm), which results in 114.75mm sidewall height.