Pirelli Winter Sottozero 3 is a winter tyre made in total of 24 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/45 R18 is 20mm wider than the narrowest dimension (205) and 130mm narrower than the widest one (355). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (225mm), which results in 101.25mm sidewall height. In 225/45 R18, there is only one possible speed index for Pirelli Winter Sottozero 3 - "H", which is good for speeds up to 210 km/h. In 225/45 R18, Winter Sottozero 3 usually competes against Blizzak LM-005, which is a tyre from Bridgestone with a rating of 88%, compared to 0% of the Pirelli in question. Latest test in 225/45 R18 was held by Sportscars in 2015, where Winter Sottozero 3 received rating "Exemplary" and finished on the 3. place. It was tested on a .
