Pirelli P Zero (PZ5) 255/45 R22

Pirelli P Zero (PZ5) is a summer tyre made in total of 76 sizes, ranging from R13 to R13 - this particular dimension is R22, which means it fits to a 22 inch/558.8mm diameter wheel. 255/45 R22 is 30mm wider than the narrowest dimension (225) and 70mm narrower than the widest one (325). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (255mm), which results in 114.75mm sidewall height.