Kumho HA32 Solus 4S is a allround tyre made in total of 73 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/40 R18 is 100mm wider than the narrowest dimension (145) and 30mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (245mm), which results in 98mm sidewall height. In 245/40 R18, there is only one possible speed index for Kumho HA32 Solus 4S - "W", which is good for speeds up to 270 km/h. In 245/40 R18, HA32 Solus 4S usually competes against EuroALL Season AS210, which is a tyre from Falken with a rating of 67%, compared to 67% of the Kumho in question.