FSA Expansion Plug for 1-1/4" carbon steerers - Turned out to be just barely too small for my steerer tube ID.
Canyon Expansion Plug for 1-1/4" carbon steerers - Turned out to be WAY too tight for my steerer tube ID.
Canyon/Acros 1-1/4" flat headset cover to replace the plastic i-Lock headset
Wheels Manufacturing 5mm + 10mm 1-1/4" headset spacers
In the end I wrapped 3 strips of paper around the FSA expander, preloaded the bearings, tightened the stem, removed the expander, and replaced it with the original friction-fit top cap. Not the plug-and-play job I was expecting.
