Michelin Pilot Sport 4S is a summer tyre made in total of 51 sizes, ranging from R17 to R17 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 255/40 R21 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 R21, Pilot Sport 4S usually competes against
P ZERO, which is a tyre from
Pirelli with a rating of 0%, compared to 0% of the
Michelin in question.
Summer
