Hankook Ventus S1 evo3 SUV K127A is a summer tyre made in total of 86 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/45 R20 is 20mm wider than the narrowest dimension (235) and 40mm narrower than the widest one (295). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (255mm), which results in 114.75mm sidewall height. In 255/45 R20, there is only one possible speed index for Hankook Ventus S1 evo3 SUV K127A - "Y", which is good for speeds up to 300 km/h. In 255/45 R20, Ventus S1 evo3 SUV K127A usually competes against Primacy 4, which is a tyre from Michelin with a rating of 84%, compared to 92% of the Hankook in question.