Avon ZX7 is a summer tyre made in total of 41 sizes, ranging from R16 to R16 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/40 R20 is 60mm wider than the narrowest dimension (215) and 20mm narrower than the widest one (295). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (275mm), which results in 110mm sidewall height. In
275/40 R20, ZX7 usually competes against
Hectorra 5, which is a tyre from
Matador with a rating of 9%, compared to 25% of the
Avon in question.
