Rear derailleur Shimano RD-M9100 11/12sp: a 11/12-speed Shimano shifting system with SHADOW RD+.
| Feature | Specification |
|---|---|
| Speeds | 11/12 |
| Cage | SGS |
| Technology | SHIMANO SHADOW RD+ |
| Chain stabilization | Adjustable chain stabilizer helps reduce chain drop, slap and noise |
| Profile | Low-profile design |
| 12-speed cassette range | 10–51T |
| Pulleys | 13T |
| Low-gear tension | Reduced derailleur and chain tension |
| Cage bumper | Bumper helps reduce impact and chain noise |