Michelin Pilot Sport A/S+ is a summer tyre made in total of 4 sizes, ranging from R19 to R19 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (255mm), which results in 102mm sidewall height. In 255/40 R20, there is only one possible speed index for Michelin Pilot Sport A/S+ - "V", which is good for speeds up to 240 km/h. In 255/40 R20, Pilot Sport A/S+ usually competes against SportContact 5 SUV, which is a tyre from Continental with a rating of 0%, compared to 0% of the Michelin in question.