Shimano Ultergra Di2 External Junction Box (SM-JC40) – all3sports

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Shimano Ultergra Di2 External Junction Box (SM-JC40)

By Shimano

Shimano Ultergra Di2 External Junction Box (SM-JC40)
Shimano Ultergra Di2 External Junction Box (SM-JC40)
Shimano Ultergra Di2 External Junction Box (SM-JC40)

Shimano Ultergra Di2 External Junction Box (SM-JC40)
Shimano Ultergra Di2 External Junction Box (SM-JC40)
Shimano Ultergra Di2 External Junction Box (SM-JC40)

Shimano Ultergra Di2 External Junction Box (SM-JC40)

By Shimano

$ 27.99

The Shimano Di2 SM-JC40 External Junction Box is the Grand Central Station of the e-tube Di2 system. READ MORE ▼

The Shimano Di2 SM-JC40 External Junction Box is the Grand Central Station of the e-tube Di2 system. All of the component and battery wires meet here before running out to their respective components. All of the wires that connect to the junction box use the same connector to make assembly that much easier. This specific junction box is made to be mounted externally only.

Remember the old days when you had to connect steel cables between the shifter and derailleurs and then stretch them before tuning them to the proper tension? How quaint.

  • Compatible with Shimano e-tube Di2 systems 
    • not compatible with Dura Ace 7970
  • For external wiring setups only
  • Made in Japan
  • Shimano part number ISMJC40

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All3sports.com
Returns Department
8601 Dunwoody Place, Suite 420
Atlanta, GA 30350


Refunds

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Exchanges

If you have ordered an item that does not fit, feel, or look right, follow these easy steps to exchange the item. Simply login to your account and place a new order for the item you need. It is best to place a new order as soon as possible to ensure availability of the alternate item. At your convenience, return the item you do not want for a full refund. Once the returned item is received byall3sports.com, a refund is applied and your exchange is complete.

 

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