Metzeler Racetec RR 180/55 R17

Metzeler Racetec RR is a winter tyre made in total of 33 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 60mm wider than the narrowest dimension (120) and -20mm narrower than the widest one (160). 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.