Shimano SM-JC40 Di2 External Frame Junction Box 4-Port ModelNumber=K4922 3/8" drive interface

3/8" drive interface

} Extruded and CNC machined aluminum body

SRAM locking grips with black clamps remain secure while providing comfort and grip for everyday rides

2Travel (mm) 175Cable Routing WirelessAdjustment InfiniteMax Height 418

Shimano SM-JC40 Di2 External Frame Junction Box 4-Port ModelNumber=K4922 3/8" drive interfaceShimano SM JC40 Di2 External Frame Junction Box 4 Port. Shimano 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