Description
SHIMANO – Junction B – E-TUBE – Internal DI2 Wire Routing – 4-Port
For internal DI2 wire routing, SHIMANO’s SM-JC41 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-JC41 junction, which is housed inside the bike frame.
- For internal wire routing
PRODUCT SPECIFICATIONS
| MODEL NO | SM-JC41 |
|---|---|
| SERIES | SHIMANO ULTEGRA R8050 Series |
| Average weight | 4.1 |
| E-tube port (pcs) | 4 |
| Specification | 4 connectors type of junction |
|---|---|
| E-tube connector (pcs) | 0 |
| Type | Built-in type |
| Type | Built-in type |
| SD300 connector (pcs) | 0 |
| SD300 port (pcs) | 0 |
| SD50 connector (pcs) | 0 |
| SD50 port (pcs) | 4 |





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