Colorado Cyclist
Shimano EW-RS910 Di2 Drop Handlebar/Internal Frame Junction Box - 2-Port with Charging
- Colorado CyclistUp to 80% off through Dec 31$145Buy
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From Colorado Cyclist
Shimano 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/