Bridgestone M788 215/75 R17.5

Bridgestone M788 is a winter tyre made in total of 11 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 215/75 R17.5 is 10mm wider than the narrowest dimension (205) and 70mm narrower than the widest one (285). This tyre profile of 75 means the sidewall height of the tyre is 75% of the tyre width (215mm), which results in 161.25mm sidewall height.