Pirelli P ZERO Nero GT 305/30 R22

Pirelli P ZERO Nero GT is a summer tyre made in total of 42 sizes, ranging from R16 to R16 - this particular dimension is R22, which means it fits to a 22 inch/558.8mm diameter wheel. 305/30 R22 is 110mm wider than the narrowest dimension (195) and 0mm narrower than the widest one (305). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (305mm), which results in 91.5mm sidewall height.