Continental WinterContact TS 870 215/40 R17

Continental WinterContact TS 870 is a winter tyre made in total of 82 sizes, ranging from R14 to R14 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 215/40 R17 is 60mm wider than the narrowest dimension (155) and -60mm narrower than the widest one (155). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (215mm), which results in 86mm sidewall height.