Dunlop SP WINTER SPORT 3D 275/45 R20

Dunlop SP WINTER SPORT 3D is a winter tyre made in total of 145 sizes, ranging from R13 to R13 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/45 R20 is 90mm wider than the narrowest dimension (185) and 0mm narrower than the widest one (275). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (275mm), which results in 123.75mm sidewall height.