Michelin CrossClimate SUV is a allround tyre made in total of 42 sizes, ranging from R16 to R16 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/45 R20 is 60mm wider than the narrowest dimension (215) and 0mm narrower than the widest one (275). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (275mm), which results in 123.75mm sidewall height. In 275/45 R20, there is only one possible speed index for Michelin CrossClimate SUV - "Y", which is good for speeds up to 300 km/h. In 275/45 R20, CrossClimate SUV usually competes against Vector 4Seasons Gen-3, which is a tyre from GoodYear with a rating of 79%, compared to 80% of the Michelin in question.