Goodyear Eagle F1 Supersport 295/40 R21

Goodyear Eagle F1 Supersport is a summer tyre made in total of 143 sizes, ranging from R18 to R18 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 295/40 R21 is 90mm wider than the narrowest dimension (205) and -20mm narrower than the widest one (275). 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.