• General shot from the arse end of proceedings. Very little wiggle room to the right of the cassette. Even less so when chain is in the big ring

  • I suspect that isn't the original hanger.
    Looks like this one has been filed to fit for some reason.
    I've just looked at replacement hangers and they don't look very different though so don't think a new one would solve this.

    As a bit of a bodge you could get a hanger extender (for using on large range cassettes) and install it on the inside of the current hanger to bring the mech in towards the cassette.

    It will look a little odd and may require some filing and a longer bolt, but will get you rolling.
    https://www.sjscycles.co.uk/gear-spares/aluminum-rear-derailleur-hanger-extender/

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