This is the only 1" Fairweather headset I could find, and it's threadless, not
threaded. Is this the headset you bought?
https://global.bluelug.com/fairweather-headset-1inch-matt-black.html
To answer your original question, there are a number of 1" threaded headset
sizes:
I'm building up the new Wolbis with mostly black componentry. Bought a
black colored 1" Fairweather headset from Blue Lug. Dropped off the frame
and the headset at LBS for the swapping. The bicycle mechanic later called
and said the headset was not compatible with my frame. This time I let
