Rotalla Setula W Race S330 275/55 R20

Rotalla Setula W Race S330 is a winter tyre made in total of 34 sizes, ranging from R18 to R18 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/55 R20 is 60mm wider than the narrowest dimension (215) and 20mm narrower than the widest one (295). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (275mm), which results in 151.25mm sidewall height.