Goodyear Eagle F1 Asymmetric 3 SUV is a summer tyre made in total of 85 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 295/40 R20 is 60mm wider than the narrowest dimension (235) and 0mm narrower than the widest one (295). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (295mm), which results in 118mm sidewall height. In 295/40 R20, there is only one possible speed index for Goodyear Eagle F1 Asymmetric 3 SUV - "Y", which is good for speeds up to 300 km/h.