Intriguing: multi speed fixed gear ...
This guy Czernysz has truly some amazing framebuilding skills; https://www.flickr.com/photos/137178031@N06/with/51027852286/
The concept is flawed and the ratio will always be the one from the fixed gear side.
Edit: I stand corrected, I rewatched and the other size is a freewheel.
@rezpe started
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Intriguing: multi speed fixed gear ...
This guy Czernysz has truly some amazing framebuilding skills;
https://www.flickr.com/photos/137178031@N06/with/51027852286/