GT Radial Champiro WinterPro is a winter tyre made in total of 2 sizes, ranging from R16 to R16 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (225mm), which results in 123.75mm sidewall height. In 225/55 R16, there is only one possible speed index for GT Radial Champiro WinterPro - "H", which is good for speeds up to 210 km/h. In 225/55 R16, Radial Champiro WinterPro usually competes against WR D4, which is a tyre from Nokian with a rating of 0%, compared to 0% of the GT in question.