Goodyear Eagle F1 Asymmetric 6 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. 255/35 R20 is 50mm wider than the narrowest dimension (205) and 10mm narrower than the widest one (265). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (255mm), which results in 89.25mm sidewall height. In 255/35 R20, Eagle F1 Asymmetric 6 usually competes against Pilot Sport 5, which is a tyre from Michelin with a rating of 97%, compared to 100% of the Goodyear in question.