• Don't you feed brake and rear derailleur into that hole? In that case it would make sense to swap between mechanical / Di2 / eTap.

  • Electric only. At least on this one.

    Edit: And bear in mind that even Di2 from now on is wireless on the front half so doesn't need a hole in the downtube

    Edit edit: Though I will be having a di2 hole in the downtube. It can double duty for dynamo

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