Pirelli P ZERO PZ4 255/40 R21

Pirelli P ZERO PZ4 is a summer tyre made in total of 719 sizes, ranging from R13 to R13 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 255/40 R21 is 110mm wider than the narrowest dimension (145) and 80mm narrower than the widest one (335). 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 R21, P ZERO PZ4 usually competes against Potenza Sport, which is a tyre from Bridgestone with a rating of 87%, compared to 89% of the Pirelli in question.