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 Shimano Ultegra Di2 Junction Box

  Item # SH-SD50JB
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Item # SH-SD50JB
MSRP: $29.99
Nashbar: $29.99
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Shimano Ultegra Di2 Junction Box

As an improvement over the Dura-Ace Di2 setup, the Ultegra Di2 group uses a junction box to simplify the wiring, giving you a cleaner look with easier setup. The junction box mounts under your bottom bracket shell (for external wiring) and connects the wires coming from the derailleurs, levers and battery.

  • Junction box mounts under your bottom bracket shell
  • Provides a secure, waterproof connection for your wiring
  • Compatible with externally-wired Ultegra Di2 setups
  • Not compatible with Dura-Ace Di2

Shimano Ultegra Di2 Junction Box

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Shimano Ultegra Di2 Junction Box Shimano Ultegra Di2 Junction Box
Nashbar: $29.99
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