Bridgestone Alenza 001 275/50 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. 275/50 R20 is 60mm wider than the narrowest dimension (215) and 0mm narrower than the widest one (275). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (275mm), which results in 137.5mm sidewall height.