Continental ContiWinterContact TS 830P SUV 255/50 R20

Continental ContiWinterContact TS 830P SUV is a winter tyre made in total of 26 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/50 R20 is 30mm wider than the narrowest dimension (225) and 50mm narrower than the widest one (305). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (255mm), which results in 127.5mm sidewall height.