Pirelli Winter Sottozero 3 is a winter tyre made in total of 14 sizes, ranging from R17 to R17 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 235/45 R17 is 10mm wider than the narrowest dimension (225) and 40mm narrower than the widest one (275). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (235mm), which results in 105.75mm sidewall height. In 235/45 R17, there is only one possible speed index for Pirelli Winter Sottozero 3 - "H", which is good for speeds up to 210 km/h. In 235/45 R17, Winter Sottozero 3 usually competes against Winter Sport 5, which is a tyre from Dunlop with a rating of 88%, compared to 0% of the Pirelli in question.