Shimano EW-JC304 Di2 Junction Box - 4 Ports Use With EW-SD300 MFPN=18013 comfort and efficient moisture transport

comfort and efficient moisture transport

Powerful daytime visible flashes

Full Speed Ahead Vero Compact 2x Cranksets feature aluminum crank arms aluminum outer chainring and inner chromoly inner chainring

6" Casing Advanced Trail TPI 120 Compound EN-DTC Bead Folding Type Tubeless Color Black Weight 908g

Shimano EW-JC304 Di2 Junction Box - 4 Ports Use With EW-SD300 MFPN=18013 comfort and efficient moisture transportShimano Di2 Frame Junction BoxFrame Junction Box connects via SD50 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 from http: e tubeproject. shimano. com