Yokohama Advan Fleva V701 is a summer tyre made in total of 47 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 235/55 R18 is 40mm wider than the narrowest dimension (195) and -10mm narrower than the widest one (225). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (235mm), which results in 129.25mm sidewall height. In 235/55 R18, there is only one possible speed index for Yokohama Advan Fleva V701 - "V", which is good for speeds up to 240 km/h.