Shimano E-Tube Di2 Internal Junction B Box Fcolourfamily_Red One piece forged inner post

SKU: 47653391108

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Shimano E-Tube Di2 Internal Junction B Box Fcolourfamily_Red One piece forged inner postShimano E Tube Di2 Internal Junction B Box The Shimano Di2 SM JC41 is designed to connect SD50 E tube wires along four points; front derailleur, rear derailleur, cockpit junction and battery mount. The B Box is used to split the main wire from Junction A to the front and rear derailleurs. It can also be used to connect a seatpost mounted battery to the system. Specifically designed for internally mounted systems for External use SM JC40.

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