Continental ContiSportContact 5 is a summer tyre made in total of 57 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/45 R20 is 70mm wider than the narrowest dimension (205) 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 Continental ContiSportContact 5 - "V", which is good for speeds up to 240 km/h. In 275/45 R20, ContiSportContact 5 usually competes against P ZERO, which is a tyre from Pirelli with a rating of 61%, compared to 44% of the Continental in question.