Shimano Di2 distributor Junction B | SM-JC41 internally
The distribution unit Junction B besizt 4 inputs and connects this to the battery, the rear derailleur, the front derailleur and the light coming from the cockpit cable.
The internal manifold is housed in the down tube of the frame. All shift cable can therefore not visible, are laid in the frame when it is prepared for this.
Connection: 4x E-Tube Cable Connection
Connection cable: EW-SD50-I (internal wiring)
Compatibility: Dura Ace Di2 9070 | Ultegra Di2 6770/6870 | XTR Di2 M9050 | Alfine Di2
Function: Junction B
Delivery: 1x Distributor