Rear derailleur Shimano RD-U4000 9sp: a 9-speed Shimano shifting system.
| Feature | Specification |
|---|---|
| Speeds | 9 |
| Cage | GS |
| Technology | LINKGLIDE |
| Profile | Low-profile design |
| Configuration | 1×9 |
| Total capacity | 35T |
| Largest-sprocket range | 41–46T |
| E-bike use | E-bike rated |