Continental WinterContact TS 870 is a winter tyre made in total of 52 sizes, ranging from R14 to R14 - this particular dimension is R15, which means it fits to a 15 inch/381mm diameter wheel. 185/60 R15 is 10mm wider than the narrowest dimension (175) and 40mm narrower than the widest one (225). This tyre profile of 60 means the sidewall height of the tyre is 60% of the tyre width (185mm), which results in 111mm sidewall height. In 185/60 R15, there is only one possible speed index for Continental WinterContact TS 870 - "T", which is good for speeds up to 190 km/h. In 185/60 R15, WinterContact TS 870 usually competes against WinterContact TS 860, which is a tyre from Continental with a rating of 90%, compared to 91% of the Continental in question.