Bridgestone Turanza T005 255/30 R20

Bridgestone Turanza T005 is a summer tyre made in total of 658 sizes, ranging from R14 to R14 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/30 R20 is 100mm wider than the narrowest dimension (155) and 60mm narrower than the widest one (315). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (255mm), which results in 76.5mm sidewall height.