Shimano Dura Ace SM-EW90-A Di2 3 Port Junction Box (A) model-switchbladecarbon275pluspro Rear Shock: 2017 Factory Series

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Shimano Dura Ace SM-EW90-A Di2 3 Port Junction Box (A) model-switchbladecarbon275pluspro Rear Shock: 2017 Factory SeriesAll 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 SM EW90 A 3 Port Cockpit Junction Box connects 1 pair of Di2 shifters to the frame junction box via 3 SD50 E tube wires OEM front wiring kit for Dura Ace Di2 9070 LED battery charge level indicator Rear Derailleur