Westlake ZuperEco Z-107 is a summer tyre made in total of 76 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 235/40 R18 is 80mm wider than the narrowest dimension (155) and -40mm narrower than the widest one (195). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (235mm), which results in 94mm sidewall height. In
235/40 R18, ZuperEco Z-107 usually competes against
PremiumContact 7, which is a tyre from
Continental with a rating of 98%, compared to 45% of the
Westlake in question.
