Bridgestone Alenza 001 255/45 R20

Bridgestone Alenza 001 is a summer tyre made in total of 88 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/45 R20 is 40mm wider than the narrowest dimension (215) and 20mm narrower than the widest one (275). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (255mm), which results in 114.75mm sidewall height.