This is for sale in a Facebook-Group. That rotary-knob at the left bar-end is actually a brake lever for the disc brake.
Pretty frankenbike-ish i think.
Seems unlikely that someone would go to the effort of installing a disc brake with internal routing etc for that. I think it's just someone trying to be clever and demonstrate how they can make fancy bikes.
This is for sale in a Facebook-Group. That rotary-knob at the left bar-end is actually a brake lever for the disc brake.
Pretty frankenbike-ish i think.