Michelin COMMANDER II 240/40 R18

Michelin COMMANDER II is a summer tyre made in total of 14 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 240/40 R18 is 100mm wider than the narrowest dimension (140) and 0mm narrower than the widest one (240). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (240mm), which results in 96mm sidewall height.