Kumho WinterCraft WS71 SUV 285/45 R20

Kumho WinterCraft WS71 SUV is a winter tyre made in total of 37 sizes, ranging from R15 to R15 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/45 R20 is 30mm wider than the narrowest dimension (255) and -20mm narrower than the widest one (265). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (285mm), which results in 128.25mm sidewall height.