Dunlop SP WINTER SPORT 3D 255/35 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. 255/35 R20 is 70mm wider than the narrowest dimension (185) and 20mm narrower than the widest one (275). 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.