Continental WinterContact TS 860S is a winter tyre made in total of 97 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/45 R18 is 30mm wider than the narrowest dimension (195) and 90mm narrower than the widest one (315). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (225mm), which results in 101.25mm sidewall height. In 225/45 R18, there are 3 possible speed indexes for Continental WinterContact TS 860S - "H","V","Y", which are good for speeds up to 210, 240, 300 km/h. In 225/45 R18, WinterContact TS 860S usually competes against Blizzak LM-005, which is a tyre from Bridgestone with a rating of 92%, compared to 65% of the Continental in question.