Shimano Di2 JC41 Junction Box Model:SM-JC41 Fast & easy disassembly and

Fast & easy disassembly and quick access to screen

5 mm spacer

Integrated SX skid provides safeguard to the chainring and glides over rocks and obstacles

Lightweight and robust

you can carry the Back-Roller Plus just like a shoulder bag thanks to the included strap

Shimano Di2 JC41 Junction Box Model:SM-JC41 Fast & easy disassembly andThe Shimano JC41 junction box for Di2 has four E Tube connections and is used as the junction B mounted in the bottom bracket area. It can be used for all electronic groupsets from Ultegra Di2 6770 and before Dura Ace R9250 or Ultegra R8150. JC41 is for internal cable routing. Compatible Cables: EW SD50 Compatibility: Dura Ace Di2 9070, Dura Ace Di2 R9150, Ultegra Di2 6770, Ultegra Di2 6870, Ultegra Di2 R8050, GRX Di2 RX815, XTR Di2 M9050, XT Di2