Dunlop Winter 255/45 R18

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. 255/45 R18 is 70mm wider than the narrowest dimension (185) and -10mm narrower than the widest one (245). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (255mm), which results in 114.75mm sidewall height. In 255/45 R18, Winter usually competes against UltraGrip Performance 3, which is a tyre from GoodYear with a rating of 90%, compared to 76% of the Dunlop in question.