It's actually a headset with an integrated threadless steerer that the owner of that bike designed and sells. Looks very tidy but it's expensive.
https://youtu.be/DOlHzF64kmg
That's nice! I like how you can keep the original forks as is.
I've converted to ahead with a BBB converter but that required for the fork threads to be cut off....
@Carabo started
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It's actually a headset with an integrated threadless steerer that the owner of that bike designed and sells. Looks very tidy but it's expensive.
https://youtu.be/DOlHzF64kmg