Bridgestone Blizzak LM-32 is a winter tyre made in total of 54 sizes, ranging from R14 to R14 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 255/40 R19 is 90mm wider than the narrowest dimension (165) and 40mm narrower than the widest one (295). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (255mm), which results in 102mm sidewall height. In 255/40 R19, there is only one possible speed index for Bridgestone Blizzak LM-32 - "V", which is good for speeds up to 240 km/h. In 255/40 R19, Blizzak LM-32 usually competes against Winter Sport 5, which is a tyre from Dunlop with a rating of 83%, compared to 0% of the Bridgestone in question.