NEW Shimano SM-JC40 Di2 External Frame Junction Box 4-Port price_changed_on_2022-09-22 comfortable and focused on the

comfortable and focused on the ride

Shimano EP600 motor

With the fast and accurate Di2 shifting technology

open shell

Seatpost: Comaptible with 27

NEW Shimano SM-JC40 Di2 External Frame Junction Box 4-Port price_changed_on_2022-09-22 comfortable and focused on theShimano Di2 Frame Junction Box Frame Junction Box connects via SD50 E tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions Use Di2 system checker to update component firmware from http: e tubeproject. shimano. com Mounts underneath the bottom bracket