Dunlop SP Sport MAXX GT is a summer tyre made in total of 118 sizes, ranging from R17 to R17 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 255/40 R19 is 20mm wider than the narrowest dimension (235) and 60mm narrower than the widest one (315). 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 R19, there are 2 possible speed indexes for Dunlop SP Sport MAXX GT - "V","Y", which are good for speeds up to 240, 300 km/h. In 255/40 R19, SP Sport MAXX GT usually competes against SportContact 6, which is a tyre from Continental with a rating of 0%, compared to 0% of the Dunlop in question.
