Pirelli Scorpion Verde is a summer tyre made in total of 109 sizes, ranging from R16 to R16 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/45 R20 is 60mm wider than the narrowest dimension (215) and 0mm narrower than the widest one (275). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (275mm), which results in 123.75mm sidewall height. In 275/45 R20, there is only one possible speed index for Pirelli Scorpion Verde - "W", which is good for speeds up to 270 km/h. In 275/45 R20, Scorpion Verde usually competes against ZEON 4xS Sport, which is a tyre from Cooper with a rating of 36%, compared to 44% of the Pirelli in question.