Shimano Di2 SM-JC40 External Bottom Bracket Junction A Box Bike Ultegra Dura Ace
Free Gift



Pin It Fancy
SHIMANO SM-JC40 JUNCTION B BOX

NEW / MSRP $34.99 / SHIPS IN 24HRS

SPECIFICATIONS:
  • Manufacturer: Shimano 
  • One of the two Junction boxes required to build a Di2 setup
  • Connects to the battery, front derailleur, rear derailleur, and the wire coming from the Junction A box by the stem/bars
  • Model: SM-JC40, Junction B
  • Under bottom bracket external mount 
  • For E-Tube applications - Ultegra 6770, Ultegra 6870, and Dura Ace 9070 Series
  • Includes two mounting bolts (long and short)
  • Condition: New, not in packaging intended for individual retail sale

Related Items