Originally Posted by Cyclaholic

The reason you can't balance a stationary bicycle is because it is a statically and dynamically unstable system, the reason you can balance a bicycle in motion is because you can alter the relative positions of the tire contact points with the road and the center of gravity so as to dynamically balance the forces of gravity and inertia, just like in my diagram except that the centripetal force is much smaller in magnitude and alternates in direction.

Now, do you have anything to prove that the PHYSICS rather than the spelling or grammar in my explanation is flawed?