Nexen N Blue 4 Season 2 is a allround tyre made in total of 158 sizes, ranging from R14 to R14 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 255/40 R21 is 100mm wider than the narrowest dimension (155) and 0mm narrower than the widest one (255). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (255mm), which results in 102mm sidewall height. In
255/40 R21, N Blue 4 Season 2 usually competes against
Quatrac Pro+, which is a tyre from
Vredestein with a rating of 60%, compared to 60% of the
Nexen in question.