Originally Posted by phidauex
Additionally, rider input is NOT necessary for a bike to retain self stability. Take a bike, and get it rolling on a flat surface, it will wobble for a moment, and then enter a stable equilibrium where the bike weaves back and forth in a gently straight line as the front wheel moves back and forth under the center of gravity. When it slows down, it can't adjust the position of the wheel relative to the center of gravity fast enough, the weaving will get more erratic, and will eventually cause the bike to fall over.
TQS, bull. Sure a bike can be designed to be stable, but if you're thinking that's what's keeping cyclists upright, think again. You can't steer a chosen path without the balancing act operating every moment. Just try riding on a painted line and you'll see what I mean - it is not possible at low speed. It is a deliberate balancing act as described in 2nd post. Precession becomes negligble at low speed anyway.