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Shimano SM-JC41 Internal Connection Box

Shimano SM-JC41 Internal Connection Box

ISMJC41

Shimano

Tax included.

Get a Shimano SM-JC41 cable junction box

For internal DI2 wire routing, the SHIMANO SM-JC41 B-junction is the central connector for DI2 systems. Wires from the front and rear derailleurs, cockpit and battery all plug into the SM-JC41 4-port junction, housed in the bike's frame.

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