Gear stages: 12, Switching system: Electric
- Shifter with clamp for mounting on the handlebars
- To convert an existing mechanical 1 x 12-speed Shimano drivetrain to an electronic Di2 drivetrain
- The upgrade kit includes a derailleur (RD-M8250-GS), a shifter (SW-M8250-R), 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: 9-45T