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A comment on Folding bicycle small enough to fit in hand luggage. Parent comment

Re:Folding bicycle small enough to fit in hand luggage by Tor3 on Wednesday March 23, 2022 @04:32AM (#30776293)
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?
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Re:Folding bicycle small enough to fit in hand luggage by drewm1980 on Wednesday March 23, 2022 @05:45AM (#30776724)
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.

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