Kumho Ecsta PS31 235/55 R17

Kumho Ecsta PS31 is a summer tyre made in total of 59 sizes, ranging from R15 to R15 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 235/55 R17 is 50mm wider than the narrowest dimension (185) and 40mm narrower than the widest one (275). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (235mm), which results in 129.25mm sidewall height.