Toyo Snowprox S954 is a winter tyre made in total of 87 sizes, ranging from R16 to R16 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 235/50 R19 is 50mm wider than the narrowest dimension (185) and 60mm narrower than the widest one (295). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (235mm), which results in 117.5mm sidewall height. In 235/50 R19, there is only one possible speed index for Toyo Snowprox S954 - "V", which is good for speeds up to 240 km/h. In 235/50 R19, Snowprox S954 usually competes against Winterhawk 4, which is a tyre from Firestone with a rating of 74%, compared to 49% of the Toyo in question.