Pirelli Scorpion ATR 325/55 R22

Pirelli Scorpion ATR is a summer tyre made in total of 20 sizes, ranging from R14 to R14 - this particular dimension is R22, which means it fits to a 22 inch/558.8mm diameter wheel. 325/55 R22 is 150mm wider than the narrowest dimension (175) and 0mm narrower than the widest one (325). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (325mm), which results in 178.75mm sidewall height.