NEW Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port variant-size-15-5 Closure: Dial/Velcro

Closure: Dial/Velcro

double-butted main triangle and 44mm headtube

the motor gearbox disengages

Dimension 26

Derailleur Capacity: 22

NEW Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port variant-size-15-5 Closure: Dial/VelcroShimano Di2 Frame Junction Box Frame 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