Yokohama Advan Neova AD08 is a summer 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. 225/45 R16 is 40mm wider than the narrowest dimension (185) and 80mm narrower than the widest one (305). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (225mm), which results in 101.25mm sidewall height. In 225/45 R16, there is only one possible speed index for Yokohama Advan Neova AD08 - "W", which is good for speeds up to 270 km/h.