Switch stages: 12, Switching system: Electric
- Shifter for mounting on the brake lever I-SPEC EV
- To convert an existing mechanical 1 x 12-speed Shimano drivetrain to an electronic Di2 drivetrain
- The upgrade kit includes a derailleur (RD-M8250-SGS), a shifter (SW-M8250-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