Unigrip Road Unique is a tyre made in total of 11 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (215mm), which results in 75.25mm sidewall height. In 215/35 R18, there is only one possible speed index for Unigrip Road Unique - "W", which is good for speeds up to 270 km/h.