Michelin PILOT ALPIN 5 is a winter tyre made in total of 133 sizes, ranging from R16 to R16 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/30 R20 is 80mm wider than the narrowest dimension (205) and 30mm narrower than the widest one (315). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (285mm), which results in 85.5mm sidewall height. In 285/30 R20, there are 2 possible speed indexes for Michelin PILOT ALPIN 5 - "V","W", which are good for speeds up to 240, 270 km/h. In 285/30 R20, PILOT ALPIN 5 usually competes against UltraGrip Performance 3, which is a tyre from GoodYear with a rating of 96%, compared to 99% of the Michelin in question.