Pirelli P Zero (PZ5) 255/40 R18

Pirelli P Zero (PZ5) is a summer tyre made in total of 76 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/40 R18 is 30mm wider than the narrowest dimension (225) and 70mm narrower than the widest one (325). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (255mm), which results in 102mm sidewall height. In 255/40 R18, P Zero (PZ5) usually competes against Turanza T005, which is a tyre from Bridgestone with a rating of 88%, compared to 88% of the Pirelli in question.