Nokian WR D4 225/40 R18

Nokian WR D4 is a winter tyre made in total of 82 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/40 R18 is 70mm wider than the narrowest dimension (155) and 50mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (225mm), which results in 90mm sidewall height. In 225/40 R18, WR D4 usually competes against Wintercraft Wp52, which is a tyre from Kumho with a rating of 55%, compared to 0% of the Nokian in question.