Riken Ultra High Performance is a tyre made in total of 55 sizes, ranging from R17 to R17 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 225/50 R17 is 20mm wider than the narrowest dimension (205) and -30mm narrower than the widest one (195). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (225mm), which results in 112.5mm sidewall height. In 225/50 R17, there are 3 possible speed indexes for Riken Ultra High Performance - "V","W","Y", which are good for speeds up to 240, 270, 300 km/h.
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Relevant tyre tests in same or similiar dimension (225/50 R17)

| Name | Stopping distance on dry | Stopping distance on wet | |||||
|---|---|---|---|---|---|---|---|
| Best values in test | 32.6 | 27.4 | |||||
| Riken Ultra High Performance | 36.9 | 37.5 | |||||
| Show test details | |||||||

| Name | Stopping distance on dry | Stopping distance on wet | |||||
|---|---|---|---|---|---|---|---|
| Best values in test | 58.1 | 24.8 | |||||
| Riken Ultra High Performance | 70.4 | 33.1 | |||||
| Show test details | |||||||