Kumho WinterCraft WS71 SUV 255/40 R21

Kumho WinterCraft WS71 SUV is a winter tyre made in total of 37 sizes, ranging from R15 to R15 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 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.