Continental Wintercontact Ts860S is a winter tyre made in total of 48 sizes, ranging from R16 to R16 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 235/40 R19 is 40mm wider than the narrowest dimension (195) and -20mm narrower than the widest one (215). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (235mm), which results in 94mm sidewall height. In 235/40 R19, there is only one possible speed index for Continental Wintercontact Ts860S - "V", which is good for speeds up to 240 km/h.