Maxtrek TREK M7 225/50 R18

Maxtrek TREK M7 is a winter tyre made in total of 26 sizes, ranging from R14 to R14 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/50 R18 is 50mm wider than the narrowest dimension (175) and 40mm narrower than the widest one (265). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (225mm), which results in 112.5mm sidewall height.