Bridgestone Potenza RE050A 305/35 R20

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. 305/35 R20 is 130mm wider than the narrowest dimension (175) and 0mm narrower than the widest one (305). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (305mm), which results in 106.75mm sidewall height.