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• The hammer trick has the effect of dislodging the wedge or the expander nut from the stem. So far so good. The problem is if the stem slides down with the expander when you hammer, or is already all the way down, the expander gets jammed in the bott…

  in How do I remove a stuck 80s quill bike stem? Comment by martin-murray_60ba3da5a200b June 2021