The 9-spline hub is a variant of our regular 142 and 148 Powershift hubs that allows you to use a sprocket instead of a cassette. This application is used for belt drive or single speed bicycles. In the table below you can check our recommendations for minimum chainring sizes for the different sprocket sizes you might want to use.
| Sprocket size (T) | Minimum chainring size 142 mm (road & gravel) |
Minimum chainring size 148 mm (MTB) |
| 5 | 6 | 4 |
| 6 | 8 | 5 |
| 7 | 9 | 5 |
| 8 | 10 | 6 |
| 9 | 12 | 7 |
| 10 | 13 | 8 |
| 11 | 14 | 8 |
| 12 | 15 | 9 |
| 13 | 17 | 10 |
| 14 | 18 | 11 |
| 15 | 19 | 11 |
| 16 | 20 | 12 |
| 17 | 22 | 13 |
| 18 | 23 | 14 |
| 19 | 24 | 14 |
| 20 | 26 | 15 |
| 21 | 27 | 16 |
| 22 | 28 | 17 |
| 23 | 29 | 17 |
| 24 | 31 | 18 |
| 25 | 32 | 19 |
| 26 | 33 | 20 |
| 27 | 35 | 20 |
| 28 | 36 | 21 |
| 29 | 37 | 22 |
| 30 | 38 | 23 |
| 31 | 40 | 23 |
| 32 | 41 | 24 |
| 33 | 42 | 25 |
| 34 | 43 | 26 |
| 35 | 45 | 26 |
| 36 | 46 | 27 |
| 37 | 47 | 28 |
| 38 | 49 | 29 |
| 39 | 50 | 29 |
| 40 | 51 | 30 |
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