Michelin e.Primacy 285/45 R20

Michelin e.Primacy is a summer tyre made in total of 178 sizes, ranging from R15 to R15 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/45 R20 is 120mm wider than the narrowest dimension (165) and -10mm narrower than the widest one (275). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (285mm), which results in 128.25mm sidewall height.