Michelin COMMANDER II 240/40 R18

Michelin COMMANDER II is a summer tyre made in total of 20 sizes, ranging from R13 to R13 - 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 -100mm narrower than the widest one (140). 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.