Originally Posted by
bonsai171
Just measured the adapter with a caliper. It is roughly 22.2mm (with a non-digital caliper) all the way down. The steerer is also 22.2mm. The only thing I can figure is that maybe the wedge isn't engaging when the adapter is raised? Below is a pic. Not much room in the headtube for the clamp to engage since the top tube and bottom tube have an opening inside the headtube. See the pic below.
https://www.pedalroom.com/bike/1986-...eedfixie-32051
Dave
The top tube and down tube have nothing to do with it, since the wedge is inside the steerer.
Oh, and MAKE SURE the wedge isn't inside the threaded part of the steerer. It MUST be completely below the threads.