Bridgestone Blizzak LM-25 245/50 R17

Bridgestone Blizzak LM-25 is a winter tyre made in total of 20 sizes, ranging from R13 to R13 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 245/50 R17 is 40mm wider than the narrowest dimension (205) and 40mm narrower than the widest one (285). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (245mm), which results in 122.5mm sidewall height.