Michelin PILOT ALPIN 5 275/40 R21

Michelin PILOT ALPIN 5 is a winter tyre made in total of 139 sizes, ranging from R16 to R16 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 275/40 R21 is 70mm wider than the narrowest dimension (205) and 40mm narrower than the widest one (315). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (275mm), which results in 110mm sidewall height. In 275/40 R21, PILOT ALPIN 5 usually competes against UltraGrip Performance 3, which is a tyre from GoodYear with a rating of 95%, compared to 100% of the Michelin in question.