Shimano Di2 distributor Junction B | SM-JC40 extern
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 external distributor will be able to require the E-Tube outward along lead cable to the frame. It is mounted under the bottom bracket on the position of the conventional cable routing. The distributor has the possibility through long cables in loops in the housing embarrassed. The cables are therefore clean and not blocked externally visible.
Connection: 4x E-Tube Cable Connection
Connection cable: EW-SD50 (external installation)
Compatibility: Dura Ace Di2 9070 | Ultegra Di2 6770/6870 | XTR Di2 M9050 | Alfine Di2
Function: Junction B
Mounting: on cable guide bottom bracket
Delivery: 1x Distributor + mounting screws