Shimano SM-JC40 Di2 External Frame Junction Box 4-Port ModelNumber=E3250 Top climbing and kick performance

Top climbing and kick performance

2mm Lever Blade Material Aluminum Position Left Primary Color Black Position Left

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Valve Length 60mm Valve Presta

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Shimano SM-JC40 Di2 External Frame Junction Box 4-Port ModelNumber=E3250 Top climbing and kick performanceShimano 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 tubeproject. shimano. com