Continental UltraContact is a summer tyre made in total of 80 sizes, ranging from R14 to R14 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 225/60 R17 is 70mm wider than the narrowest dimension (155) and -30mm narrower than the widest one (195). This tyre profile of 60 means the sidewall height of the tyre is 60% of the tyre width (225mm), which results in 135mm sidewall height. In 225/60 R17, there are 2 possible speed indexes for Continental UltraContact - "H","V", which are good for speeds up to 210, 240 km/h.