Michelin Pilot Sport EV is a summer tyre made in total of 60 sizes, ranging from R19 to R19 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/45 R20 is 50mm wider than the narrowest dimension (235) and 30mm narrower than the widest one (315). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (285mm), which results in 128.25mm sidewall height. In 285/45 R20, there is only one possible speed index for Michelin Pilot Sport EV - "W", which is good for speeds up to 270 km/h. In 285/45 R20, Pilot Sport EV usually competes against Kinergy 4S2 H750, which is a tyre from Hankook with a rating of 88%, compared to 0% of the Michelin in question.