Michelin PILOT ALPIN 5 SUV is a winter tyre made in total of 118 sizes, ranging from R17 to R17 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 265/40 R21 is 40mm wider than the narrowest dimension (225) and 50mm narrower than the widest one (315). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (265mm), which results in 106mm sidewall height. In
265/40 R21, PILOT ALPIN 5 SUV usually competes against
WinterContact TS 870 P, which is a tyre from
Continental with a rating of 94%, compared to 94% of the
Michelin in question.