Pirelli P ZERO is a summer tyre made in total of 307 sizes, ranging from R17 to R17 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (205mm), which results in 102.5mm sidewall height. In 205/50 R17, there is only one possible speed index for Pirelli P ZERO - "V", which is good for speeds up to 240 km/h. In 205/50 R17, P ZERO usually competes against Pilot Sport 4, which is a tyre from Michelin with a rating of 88%, compared to 61% of the Pirelli in question.