Pirelli Winter Sottozero 3 is a winter tyre made in total of 14 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/45 R18 is 20mm wider than the narrowest dimension (225) and -30mm narrower than the widest one (215). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (245mm), which results in 110.25mm sidewall height. In 245/45 R18, there is only one possible speed index for Pirelli Winter Sottozero 3 - "V", which is good for speeds up to 240 km/h. In 245/45 R18, Winter Sottozero 3 usually competes against Winter Sport 5, which is a tyre from Dunlop with a rating of 83%, compared to 60% of the Pirelli in question. Latest test in 245/45 R18 was held by Sportscars in 2018, where Winter Sottozero 3 received rating "Good" and finished on the 7. place. It was tested on a .