• the cable guide for the rear derailleur is on top of the chainstay.
    How does that work? Does the frame need a cable guide above the BB?

  • More options will work. Without using extra cable guides, the rear mech would still work, because the cable pull is the same. But the cable will wrap around the stay.
    You can solve this with a cable guide above the BB or a cable guide under the chainstay. In my opinion a cable guid under the chainstay is most elegant.

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