Fortune FSR901 is a winter tyre made in total of 84 sizes, ranging from R14 to R14 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. 225/55 R16 is 70mm wider than the narrowest dimension (155) and 70mm narrower than the widest one (295). 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 Fortune FSR901 - "V", which is good for speeds up to 240 km/h. In 225/55 R16, FSR901 usually competes against Aspire XP Winter, which is a tyre from Apollo with a rating of 82%, compared to 31% of the Fortune in question.