Gislaved Ultra Speed 2 is a summer tyre made in total of 90 sizes, ranging from R15 to R15 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/40 R20 is 80mm wider than the narrowest dimension (175) and 40mm narrower than the widest one (295). 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, Ultra Speed 2 usually competes against
Potenza Sport, which is a tyre from
Bridgestone with a rating of 87%, compared to 25% of the
Gislaved in question.
