Bridgestone Battlax BT-021 190/55 R17

Bridgestone Battlax BT-021 is a winter tyre made in total of 6 sizes, ranging from R17 to R17 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 190/55 R17 is 10mm wider than the narrowest dimension (180) and 0mm narrower than the widest one (190). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (190mm), which results in 104.5mm sidewall height.