»12-speed wireless Di2 shifting for a fast, sleek, and ergonomic setup

Designed for MTB riders who want better shifting performance without a complete rebuild

More economical because you don't have to replace your entire groupset

Makes assembly easier and ensures long-term compatibility

Lightweight and stiff setup with the aluminum derailleur cage

Article details

• Rear derailleur (Di2 spec.): RD-M8250 (Number of gears: 12, Compatible chain: HG 12-speed, Lightest gear: Max. 45T (GS) / 51T (SGS), Min. 45T (GS) / 51T (SGS), Heaviest gear: Max. 9T (GS) / 10T (SGS), Min. 9T (GS) / 10T (SGS))

• Gear shift control (Di2): SW-M8250

• Battery: BT-DN320 (Capacity: 2.32 Wh, 0.305 Ah)

• Battery charger: EC-DN100

• QUICK-LINK connector: SM-CN910-12