It doesn't appear to support bicycles with gears. Is that something planned for a future model? Or do gears somehow become unnecessary with electric assist? Could you even retrofit this to a standard cheap 15-gear bike, or is it strictly fixed-gear only?
I think it supports bikes with gears where the pedals are( in the middle not on the last wheel ). If you look in the video at about 3:58 you will see some bikes with gears. This does limit you to two to four gears but that should be enough. Just have two low gears and one high one.