Electronic drivetrain groups and components offering fast, precise, and consistent shifting. High-performance systems designed for maximum reliability, optimized ergonomics, and uncompromising tuning, on road and gravel.
Shimano BT-DN300 internal lithium-ion battery for compatible 12-speed Di2 drivetrains, including Dura-Ace, Ultegra, 105 and GRX. Features three SD300 ports, 500 mAh capacity and 7.4 V output.
Transmits interactive signals and power to each electronic component through a "plug & gap" connection Compact, weatherproof connector Easy to route through the frame
