Bridgestone R227 245/70 R17.5

Bridgestone R227 is a tyre made in total of 9 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/70 R17.5 is 40mm wider than the narrowest dimension (205) and 20mm narrower than the widest one (265). This tyre profile of 70 means the sidewall height of the tyre is 70% of the tyre width (245mm), which results in 171.5mm sidewall height.