Shimano SM-JC40 Di2 External Frame Junction Box 4-Port


$27.98 $39.97

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  • Estimated Delivery:Jan 18 - Jan 25

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Shimano Di2 Frame Junction BoxMounts underneath the bottom bracket shell. 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 https://e-tubeproject.shimano.com/.

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