Continental WinterContact TS 870 P 245/50 R20

Continental WinterContact TS 870 P is a winter tyre made in total of 222 sizes, ranging from R16 to R16 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 245/50 R20 is 40mm wider than the narrowest dimension (205) and 40mm narrower than the widest one (285). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (245mm), which results in 122.5mm sidewall height.