Michelin Pilot Sport 4 SUV 245/45 R21

Michelin Pilot Sport 4 SUV is a summer tyre made in total of 137 sizes, ranging from R17 to R17 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 245/45 R21 is 20mm wider than the narrowest dimension (225) and 90mm narrower than the widest one (335). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (245mm), which results in 110.25mm sidewall height.