Gear steps: 12, Shifting system: Electric
- To upgrade an existing mechanical 1 x 12-speed Shimano drivetrain to an electronic Di2 drivetrain
- The upgrade kit includes a derailleur (RD-M9250-SGS), a shifter (SW-M9250-IR), a battery for the derailleur (BT-DN320), and the corresponding charger (EC-DN100), as well as a chain lock (SM-CN910-12)
- For 12-speed cassette: 10-51T
- Gear steps: 12
- Shifting system: Electric