Dunlop Winter is a winter tyre made in total of 66 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/40 R18 is 60mm wider than the narrowest dimension (185) and 0mm narrower than the widest one (245). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (245mm), which results in 98mm sidewall height. In
245/40 R18, Winter usually competes against
WinterContact TS 870 P, which is a tyre from
Continental with a rating of 93%, compared to 93% of the
Dunlop in question.