Shimano EW-JC304 Di2 Junction Box - 4 Ports Use With EW-SD300 100mm x 100mm Model Maven Ultimate Description MC/Lever

Model Maven Ultimate Description MC/Lever Overhaul Kit

14t upper and 20t lower pulley wheels consist of an aluminum disc that's co molded with a durable composite tooth profile

Chromoly steel hardware

Combo: features user resettable 4-digit combination

9-speed triple front derailleur

Shimano EW-JC304 Di2 Junction Box - 4 Ports Use With EW-SD300 100mm x 100mm Model Maven Ultimate Description MC/LeverShimano 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