Continental Wintercontact Ts860S is a winter tyre made in total of 48 sizes, ranging from R16 to R16 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 265/35 R21 is 70mm wider than the narrowest dimension (195) and -50mm narrower than the widest one (215). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (265mm), which results in 92.75mm sidewall height. In 265/35 R21, there is only one possible speed index for Continental Wintercontact Ts860S - "W", which is good for speeds up to 270 km/h.