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decent 1" quill to Ahead adapter
Oxymoron :-)
It would be possible to make one using the expanding mandrel design, but nobody bothers because the people who want an adapter don't want to pay £50 for one. I can't see any good reason to select among the many generic ones which all use the same wedge expansion method. Check the length of the 1⅛" section and the transition to the ⅞" section if you intend to slam the stem, some of them need at least ½" from the bottom of the stem to the top of the headset lock nut.

gbj_tester
SternsCycles
Building up this Gitane for a mate of mine.
Also, can anyone recommend a decent 1" quill to Ahead adapter?