Cooper Zeon CS8 is a summer tyre made in total of 121 sizes, ranging from R15 to R15 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. 225/50 R16 is 40mm wider than the narrowest dimension (185) and 30mm narrower than the widest one (255). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (225mm), which results in 112.5mm sidewall height. In 225/50 R16, there is only one possible speed index for Cooper Zeon CS8 - "W", which is good for speeds up to 270 km/h.
