Pirelli Angel ST 180/55 R17

Pirelli Angel ST is a winter tyre made in total of 5 sizes, ranging from R17 to R17 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 180/55 R17 is 20mm wider than the narrowest dimension (160) 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.