Dunlop SP Sport MAXX RT2 255/40 R18

Dunlop SP Sport MAXX RT2 is a summer tyre made in total of 28 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/40 R18 is 50mm wider than the narrowest dimension (205) and 30mm narrower than the widest one (285). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (255mm), which results in 102mm sidewall height. In 255/40 R18, SP Sport MAXX RT2 usually competes against Cinturato P7, which is a tyre from Pirelli with a rating of 80%, compared to 77% of the Dunlop in question.