GT Radial Champiro WinterPro HP is a winter tyre made in total of 21 sizes, ranging from R16 to R16 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 255/50 R19 is 50mm wider than the narrowest dimension (205) and 0mm narrower than the widest one (255). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (255mm), which results in 127.5mm sidewall height. In 255/50 R19, there is only one possible speed index for GT Radial Champiro WinterPro HP - "V", which is good for speeds up to 240 km/h. In 255/50 R19, Radial Champiro WinterPro HP usually competes against Aspire XP Winter, which is a tyre from Apollo with a rating of 50%, compared to 49% of the GT in question.