Sentury Qirin 990 is a summer tyre made in total of 113 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 (275). 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, Qirin 990 usually competes against
Sport Master, which is a tyre from
Linglong with a rating of 77%, compared to 14% of the
Sentury in question.
