[Tor3]

From the picture it looks like it would be unsteady unless you hold firmly onto the handle bars - is that right? What happens if you let go?

[drewm1980]

I'm also surprised by that seemingly negative fork rake.

This claims stability is more determined by fork ~trail. http://avaghon.nl/download/Naloop_Bikestability-Forkrake.pdf

This bike has a steeper head tube, reducing trail. But reducing rake (even if it goes negative), increases the trail again.

Stability is more complicated than just that, though... iirc bicycles have a bunch of nodes, including 1? 2? that are unstable but slow enough that riders don't notice they're compensating.