GT Radial Champiro UHP1 255/35 R20

GT Radial Champiro UHP1 is a summer tyre made in total of 2 sizes, ranging from R15 to R15 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/35 R20 is 50mm wider than the narrowest dimension (205) and 0mm narrower than the widest one (255). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (255mm), which results in 89.25mm sidewall height.