Nokian Hakkapeliitta R3 is a winter tyre made in total of 79 sizes, ranging from R14 to R14 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 265/35 R21 is 90mm wider than the narrowest dimension (175) and 0mm narrower than the widest one (265). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (265mm), which results in 92.75mm sidewall height. In 265/35 R21, there is only one possible speed index for Nokian Hakkapeliitta R3 - "T", which is good for speeds up to 190 km/h.