Yokohama Geolandar SUV G055E is a summer tyre made in total of 33 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/65 R18 is 20mm wider than the narrowest dimension (205) and 20mm narrower than the widest one (245). This tyre profile of 65 means the sidewall height of the tyre is 65% of the tyre width (225mm), which results in 146.25mm sidewall height. In 225/65 R18, there is only one possible speed index for Yokohama Geolandar SUV G055E - "H", which is good for speeds up to 210 km/h.