Dunlop SP Sport MAXX GT is a summer tyre made in total of 118 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 245/35 R20 is 10mm wider than the narrowest dimension (235) and 70mm narrower than the widest one (315). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (245mm), which results in 85.75mm sidewall height. In 245/35 R20, there is only one possible speed index for Dunlop SP Sport MAXX GT - "Y", which is good for speeds up to 300 km/h. In 245/35 R20, SP Sport MAXX GT usually competes against SportContact 6, which is a tyre from Continental with a rating of 77%, compared to 0% of the Dunlop in question.