Continental Conti Road 180/55 R17

Continental Conti Road is a summer tyre made in total of 10 sizes, ranging from R13 to R13 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 180/55 R17 is 40mm wider than the narrowest dimension (140) and 10mm narrower than the widest one (190). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (180mm), which results in 99mm sidewall height.