Nokian WR D4 is a winter tyre made in total of 82 sizes, ranging from R13 to R13 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 205/50 R17 is 50mm wider than the narrowest dimension (155) and 70mm narrower than the widest one (275). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (205mm), which results in 102.5mm sidewall height. In 205/50 R17, there are 2 possible speed indexes for Nokian WR D4 - "H","V", which are good for speeds up to 210, 240 km/h. In 205/50 R17, WR D4 usually competes against WR Snowproof, which is a tyre from Nokian with a rating of 55%, compared to 0% of the Nokian in question.
