Bridgestone Potenza RE050A 285/40 R19

Bridgestone Potenza RE050A is a summer tyre made in total of 109 sizes, ranging from R13 to R13 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 285/40 R19 is 110mm wider than the narrowest dimension (175) and 20mm narrower than the widest one (305). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (285mm), which results in 114mm sidewall height.