Bridgestone Blizzak DM-V2 is a winter tyre made in total of 70 sizes, ranging from R15 to R15 - this particular dimension is R15, which means it fits to a 15 inch/381mm diameter wheel. This tyre profile of 80 means the sidewall height of the tyre is 80% of the tyre width (195mm), which results in 156mm sidewall height. In 195/80 R15, there is only one possible speed index for Bridgestone Blizzak DM-V2 - "R", which is good for speeds up to 170 km/h.