• The rear dropouts are beefy enough to be slightly milled out into super-short horizontals, just enough to properly get away with a half-link chain.

    Then, this is going to become a tight geo porteur bike, something that is a bit in the style of this 3rensho beauty that has impressed me ever since I saw it first: http://www.cycleexif.com/3rensho-porteur

    Here's a quick and dirty mockup:

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