Pirelli Scorpion All Season SF2 is a allround tyre made in total of 32 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 265/45 R20 is 30mm wider than the narrowest dimension (235) and 10mm narrower than the widest one (275). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (265mm), which results in 119.25mm sidewall height. In 265/45 R20, there is only one possible speed index for Pirelli Scorpion All Season SF2 - "Y", which is good for speeds up to 300 km/h. In 265/45 R20, Scorpion All Season SF2 usually competes against Potenza Sport, which is a tyre from Bridgestone with a rating of %, compared to 0% of the Pirelli in question.