What is the stem/seatpost thing on the Bicymple? Anybody know if that's a pre-existing part that's been repurposed or if it's something that they've had custom fabricated?



There are more pictures on their kickstarter page.
It's a stem, which has had the bar mount replaced with  a seatpost clamp.  It is a custom part for this frame design, only.  They are having it fabbed.