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Di2 2nd junction box

Im looking at using an internal battery with external mount (has 6 inputs)
1 for battery , 1 for junction a , 2 for front n rear mech.

Does anybody know if on 1 of the other ports you would be able to add a 3 port box to this so i can run a set of shifters on the bars just for the rear mech,ie sprinter shifters.

Front n rear mech are the r8050 .


  • andy_fandy_f Posts: 474
    If your using ST-8050 shifters then your sprint shift buttons plug straight into the shifters with no need for a second box.
    "Let your life rule your job, not your job rule your life"

    Born to ride, forced to work.
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