Bridgestone Potenza Sport is a summer tyre made in total of 133 sizes, ranging from R17 to R17 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 215/60 R17 is 10mm wider than the narrowest dimension (205) and 70mm narrower than the widest one (285). This tyre profile of 60 means the sidewall height of the tyre is 60% of the tyre width (215mm), which results in 129mm sidewall height. In 215/60 R17, Potenza Sport usually competes against Pilot Sport 4 S, which is a tyre from Michelin with a rating of 86%, compared to 89% of the Bridgestone in question.