• can't charge when riding

    That would be a "no" from me. Why would they even stop that?

    I've got 12s mechanical on my MTB and that works fine. Not even seen 12s Di2 yet though.

  • Why would they even stop that?

    ...In pursuit of the false god of wireless shifting, a la SRAM. I think it now has batteries in the mechs that need separate charging. ie faff on a long ride.

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