SHIMANO - Junction B - E-TUBE - External Wire Routing - 4-Port
For external DI2 wire routing, SHIMANO's SM-JC40 Junction B is the central connector for DI2 systems. Wires from the front and rear derailleurs, cockpit area, and battery all plug into the 4-port SM-JC40 junction, which is mounted under the bottom bracket.
- For external wire routing
|SERIES||SHIMANO ULTEGRA R8050 Series|
|E-tube port (pcs)||4|
|Specification||4 connectors type of junction|
|E-tube connector (pcs)||0|