Shimano SM-JC40 Di2 External Frame Junction Box 4-Port ModelNumber=K4922 }SRAM DUB Crank Arm Bolt

}SRAM DUB Crank Arm Bolt Kit - M18/M30 Self-Extracting For SRAM/Truvativ Lunar

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

Width 2 Bolt Position Middle

} Extruded and CNC machined aluminum body

Shimano SM-JC40 Di2 External Frame Junction Box 4-Port ModelNumber=K4922 }SRAM DUB Crank Arm BoltShimano 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