Bridgestone R168 235/75 R17.5

Bridgestone R168 is a tyre made in total of 8 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 235/75 R17.5 is 225mm wider than the narrowest dimension (10) and 30mm narrower than the widest one (265). This tyre profile of 75 means the sidewall height of the tyre is 75% of the tyre width (235mm), which results in 176.25mm sidewall height.