Continental WinterContact TS 870 P 235/55 R21

Continental WinterContact TS 870 P is a winter tyre made in total of 222 sizes, ranging from R16 to R16 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 235/55 R21 is 30mm wider than the narrowest dimension (205) and 50mm narrower than the widest one (285). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (235mm), which results in 129.25mm sidewall height.