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. 225/40 R19 is 30mm wider than the narrowest dimension (195) and -10mm narrower than the widest one (215). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (225mm), which results in 90mm sidewall height. In 225/40 R19, there are 2 possible speed indexes for Continental Wintercontact Ts860S - "H","W", which are good for speeds up to 210, 270 km/h.