Bridgestone Potenza RE050A is a summer tyre made in total of 109 sizes, ranging from R13 to R13 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/30 R20 is 100mm wider than the narrowest dimension (175) and 30mm narrower than the widest one (305). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (275mm), which results in 82.5mm sidewall height. In
275/30 R20, Potenza RE050A usually competes against
UltraGrip Performance+, which is a tyre from
GoodYear with a rating of 90%, compared to 0% of the
Bridgestone in question.
