Michelin X Ice Xi3 275/40 R20

Michelin X Ice Xi3 is a summer tyre made in total of 6 sizes, ranging from R13 to R13 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/40 R20 is 50mm wider than the narrowest dimension (225) and 0mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (275mm), which results in 110mm sidewall height.