Goodyear Eagle F1 Supersport is a summer tyre made in total of 154 sizes, ranging from R13 to R13 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 315/35 R21 is 110mm wider than the narrowest dimension (205) and -40mm narrower than the widest one (275). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (315mm), which results in 110.25mm sidewall height. In
315/35 R21, Eagle F1 Supersport usually competes against
Ventus S1 evo3 K127, which is a tyre from
Hankook with a rating of 81%, compared to 81% of the
Goodyear in question.