Nokian WR D4 is a winter tyre made in total of 82 sizes, ranging from R13 to R20 - this particular dimension is R14, which means it fits to a 14 inch/355.6mm diameter wheel. 185/65 R14 is 30mm wider than the narrowest dimension (155) and 90mm narrower than the widest one (275). This tyre profile of 65 means the sidewall height of the tyre is 65% of the tyre width (185mm), which results in 120.25mm sidewall height. In 185/65 R14, there is only one possible speed index for Nokian WR D4 - "T", which is good for speeds up to 190 km/h. In 185/65 R14, WR D4 usually competes against KRISALP HP3, which is a tyre from Kleber with a rating of 85%, compared to 86% of the Nokian in question.