Dunlop SP Sport MAXX RT2 215/40 R17

Dunlop SP Sport MAXX RT2 is a summer tyre made in total of 101 sizes, ranging from R17 to R17 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 215/40 R17 is 10mm wider than the narrowest dimension (205) and 70mm narrower than the widest one (285). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (215mm), which results in 86mm sidewall height.