SHIMANO Distributor Di2 Junction B | Internal SM-JC41
The distribution unit Junction B has 4 inputs and connects via this the battery, the rear derailleur, the front derailleur and the cable coming from the cockpit.
The internal distributor is housed in the down tube of the frame. All switching cables can thus be laid in the frame, not visible, if this is prepared for it.
Connection: 4x E-Tube cable connection
Connection cable: EW-SD50-I (internal installation)
Compatibility: Dura Ace Di2 9070 | Ultegra Di2 6770/6870 | XTR Di2 M9050 | Alfine Di2
Function: Junction B
Fixing: in the frame
Scope of delivery: 1x distributor