Cambria Bicycle Outfitters Since 1986

Shimano E-Tube Di2 External Junction B Box

Write a review
| Ask a question
Color
Option

Only 5 items left

sku: 71203

  • Relax with 365 Day Returns
  • Serving our customers Since 1986!
  • Safe and Secure for peace of mind
  • Pay by Card, PayPal, Apple Pay and Google Pay

Description

Shimano E-Tube Di2 External Junction B Box

The Shimano Di2 SM-JC40 is designed to connect SD50 E-tube wires along four points; front derailleur, rear derailleur, cockpit junction and battery mount.

The B-Box is used to split the main wire from Junction A to the front and rear derailleurs. It can also be used to connect a seatpost mounted battery to the system.

Specifically designed for externally mounted systems and mounts underneath bottom bracket shell - for External systems use SM-JC41


Reviews