Continental VanContact 4Season is a allround tyre made in total of 37 sizes, ranging from R15 to R15 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. 285/55 R16 is 90mm wider than the narrowest dimension (195) and -50mm narrower than the widest one (235). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (285mm), which results in 156.75mm sidewall height. In 285/55 R16, there is only one possible speed index for Continental VanContact 4Season - "N", which is good for speeds up to km/h.