The Shimano SM-JC41 is an internal Junction B for Shimano Di2 systems with E-Tube wiring. The compact junction box connects several electronic components inside the frame and enables clean, protected internal cable routing.
With a total of 4 E-Tube ports, the SM-JC41 is designed for systems with EW-SD50 cables. The junction itself is not a Master Unit and is typically installed inside the frame, often around the bottom bracket or down tube.
Top features at a glance:
- 4 E-Tube ports: for connecting multiple Di2 components in a central junction.
- Internal installation: for protected and tidy cable routing inside the bicycle frame.
- EW-SD50 compatible: suitable for Shimano E-Tube systems of the SD50 generation.
Technical specifications:
- Manufacturer: Shimano
- Model: SM-JC41
- Type: Junction B / junction box
- Installation: internal in the frame
- E-Tube ports: 4
- E-Tube connectors: 0
- Master Unit: No
- Compatible system: Shimano E-Tube
- Compatible cable: EW-SD50
- Cable routing: internal
- Weight: approx. 4.1 g
- Color: Black
Scope of delivery:
- 1x Shimano SM-JC41 Junction B / internal Di2 junction box
- Note: workshop packaging (without original packaging)
Manufacturer part no.: ISMJC41 | EAN: 4524667827467
Compact internal Di2 junction box for clean E-Tube wiring inside the frame.
SKU: L0G4
Shimano SM-JC41 Di2 Junction B | 4-port | internal | EW-SD50
The Shimano SM-JC41 is an internal Junction B for Shimano Di2 systems with E-Tube wiring. The compact junction box connects several electronic components inside the frame and enables clean, protected internal cable routing.
With a total of 4 E-Tube ports, the SM-JC41 is designed for systems with EW-SD50 cables. The junction itself is not a Master Unit and is typically installed inside the frame, often around the bottom bracket or down tube.
Top features at a glance:
- 4 E-Tube ports: for connecting multiple Di2 components in a central junction.
- Internal installation: for protected and tidy cable routing inside the bicycle frame.
- EW-SD50 compatible: suitable for Shimano E-Tube systems of the SD50 generation.
Technical specifications:
- Manufacturer: Shimano
- Model: SM-JC41
- Type: Junction B / junction box
- Installation: internal in the frame
- E-Tube ports: 4
- E-Tube connectors: 0
- Master Unit: No
- Compatible system: Shimano E-Tube
- Compatible cable: EW-SD50
- Cable routing: internal
- Weight: approx. 4.1 g
- Color: Black
Scope of delivery:
- 1x Shimano SM-JC41 Junction B / internal Di2 junction box
- Note: workshop packaging (without original packaging)
Manufacturer part no.: ISMJC41 | EAN: 4524667827467
Compact internal Di2 junction box for clean E-Tube wiring inside the frame.
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Shimano Europe B.V. distributes Shimano bicycle components and accessories, including drivetrains, brakes, pedals, wheelsets, shoes, and cycling apparel. The brand is known worldwide for reliable technology, precise shifting performance, and durable products for road bikes, mountain bikes, gravel bikes, e-bikes, and everyday bicycles.
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