Roadstone Winguard Sport is a winter tyre made in total of 12 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/45 R18 is 70mm wider than the narrowest dimension (185) and 20mm narrower than the widest one (275). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (255mm), which results in 114.75mm sidewall height. In
255/45 R18, Winguard Sport usually competes against
Blizzak LM-005, which is a tyre from
Bridgestone with a rating of 82%, compared to 0% of the
Roadstone in question.
