Falken ZIEX ZE310 Ecorun is a summer tyre made in total of 150 sizes, ranging from R14 to R14 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. 235/60 R16 is 50mm wider than the narrowest dimension (185) and -10mm narrower than the widest one (225). This tyre profile of 60 means the sidewall height of the tyre is 60% of the tyre width (235mm), which results in 141mm sidewall height. In 235/60 R16, there is only one possible speed index for Falken ZIEX ZE310 Ecorun - "W", which is good for speeds up to 270 km/h.