mountain bike tires for wet conditions-Shimano EW-JC304 Di2 Junction Box

Color Black
Size 4 Ports
Option Fits - EW-SD300
Qty:

Shimano EW-JC304 Di2 Junction Box

  • Shimano Di2 Frame Junction Box
  • Connects via SD-300 E-tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount
  • All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
  • Use Di2 system checker to update component firmware
  • Number of Ports: 4