Falken EUROWINTER HS437 is a winter tyre made in total of 2 sizes, ranging from R14 to R14 - this particular dimension is R14, which means it fits to a 14 inch/355.6mm diameter wheel. This tyre profile of 80 means the sidewall height of the tyre is 80% of the tyre width (175mm), which results in 140mm sidewall height. In 175/80 R14, there is only one possible speed index for Falken EUROWINTER HS437 - "T", which is good for speeds up to 190 km/h.