Pirelli P ZERO Nero GT 225/35 R18

Pirelli P ZERO Nero GT is a summer tyre made in total of 46 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/35 R18 is 30mm wider than the narrowest dimension (195) and 80mm narrower than the widest one (305). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (225mm), which results in 78.75mm sidewall height.