- Includes cassette, derailleur, shifter and chain
- Single shift options are for eMTB to keep the user from shifting multiple gears under load, significantly reducing the rate of bent teeth and broken chains
- Cassette fits HG splined Shimano/SRAM 8-10sp freehubs
| Model | Box Four Prime 9, Box Three Prime 9, Box Two Prime 9 |
| Speed | 8, 9 |
| Range | 11-42t, 11-50t |
| Freehub Type | HG (8-11sp) |
| Shifter | Multi Shift, Single Shift |
| Color | Black |
