Kumho Ecsta PS31 205/40 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. 205/40 R17 is 20mm wider than the narrowest dimension (185) and 70mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (205mm), which results in 82mm sidewall height.