Bridgestone Potenza Race 255/35 R18

Bridgestone Potenza Race is a summer tyre made in total of 25 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/35 R18 is 30mm wider than the narrowest dimension (225) and 70mm narrower than the widest one (325). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (255mm), which results in 89.25mm sidewall height.