Nexen WinGuard Sport 2 WU7 is a winter tyre made in total of 90 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 235/40 R18 is 40mm wider than the narrowest dimension (195) and 40mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (235mm), which results in 94mm sidewall height. In 235/40 R18, there are 2 possible speed indexes for Nexen WinGuard Sport 2 WU7 - "V","W", which are good for speeds up to 240, 270 km/h. In 235/40 R18, WinGuard Sport 2 WU7 usually competes against Wintrac Pro, which is a tyre from Vredestein with a rating of 81%, compared to 63% of the Nexen in question.