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Shimano SM-JC41 Junction B Internal Wire Routing 4-Port

Shimano SM-JC41 Junction B Internal Wire Routing 4-Port

Regular price
$40.00
Sale price
$40.00

  • 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..