Hankook Ventus S1 evo2 SUV K117A is a summer tyre made in total of 69 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/55 R18 is 40mm wider than the narrowest dimension (215) and 40mm narrower than the widest one (295). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (255mm), which results in 140.25mm sidewall height. In 255/55 R18, there are 3 possible speed indexes for Hankook Ventus S1 evo2 SUV K117A - "W","Y","V", which are good for speeds up to 270, 300, 240 km/h. In 255/55 R18, Ventus S1 evo2 SUV K117A usually competes against ContiWinterContact TS 850P, which is a tyre from Continental with a rating of 83%, compared to 23% of the Hankook in question.