• Anyone knows whats inside a Junction B box?

    It is my understanding that with the e-tube system all the brains is in the derailleurs, shifters, junction box A (bar end in my case), and battery (assumption from the fact that syncro shifting isnt compatible with the older batteries).

    What I'm getting at, is it possible in theory to splice the cables where they'd meet at the bottom bracket, and solder/crimp all red cables in a bunch, and all black cables in a bunch?

    This is not the desired end result of course, but the easiest way to get the idea across.

  • Anyone knows whats inside a Junction B box?

    In terms of electronics, nothing.

    What I'm getting at, is it possible in theory to splice the cables where they'd meet at the bottom bracket, and solder/crimp all red cables in a bunch, and all black cables in a bunch?

    Yes.

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