Pirelli P Zero Winter 2 is a winter tyre made in total of 41 sizes, ranging from R18 to R18 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/35 R20 is 50mm wider than the narrowest dimension (235) and -10mm narrower than the widest one (275). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (285mm), which results in 99.75mm sidewall height. In 285/35 R20, there is only one possible speed index for Pirelli P Zero Winter 2 - "W", which is good for speeds up to 270 km/h. In 285/35 R20, P Zero Winter 2 usually competes against Winter i*cept evo3 W330, which is a tyre from Hankook with a rating of 88%, compared to 90% of the Pirelli in question.