Bridgestone Dueler H/T 685 255/70 R18

Bridgestone Dueler H/T 685 is a summer tyre made in total of 3 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/70 R18 is 10mm wider than the narrowest dimension (245) and 0mm narrower than the widest one (255). This tyre profile of 70 means the sidewall height of the tyre is 70% of the tyre width (255mm), which results in 178.5mm sidewall height.