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and is customizable for your racing style
129808-Q0-L
153758-Q0-L
146022-Q0-L
PD3700 TL0655 610909
Shimano SM-JC40 Di2 External Frame Junction Box 4-Port Baskets and is customizable for yourShimano 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 Product Specifics Today's Stock
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