Shimano E-Tube Di2 Junction Box

It’s time to connect.

Shimano’s E-Tube Di2 Junction Box (also known as the B junction) connects all your component and battery wires to make assembly much easier. It´s a crucial item along with the five required wire sections to operate your Ultegra 6770, Ultegra 6870, or Dura-Ace 9070 Di2 shift system. The E-Tube Di2 Junction Box is available in two configurations: Internal (SM-JC41) and External (SM-JC40).

Details

Connects Di2 cycling component and battery wires
Available in external or internal configurations
Shimano´s Di2 is the most popular electronic drivetrain in the pro ranks
Item #SHI0394

Tech Specs

Crankset Compatibility: 2 x 10
Compatible Components: Shimano Ultegra Di2
Recommended Use: ditching your mechanical tethers
Manufacturer Warranty: 2 years

1. Your order is usually shipped out within 24-48 hours after your payment is received.
2. The tracking number of your parcel will be sent to you after your order is despatched. You may use the tracking number to check the status of your order online.
3. The shipping fee will be auto-added in the grand total when you send payment.

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