Stationary bicycles need support to stop from falling over because they lack gyroscopic stabilization. Right?
If you ride a free bicycle on a treadmill (so both wheels are spinning) will it fall over or stay upright?
If you fall over on a treadmill, does it matter if this treadmill bicycle combo is on a train?
It’s not the gyroscope effect.
If it was, you’re talking about a force capable of keeping 200-300kg vehicle upright with mechanical disadvantage (the height of the bike vs the wheels on the floor)
If that was the case, how would you steer the bike with just 80cm of handlebar? Even if you divide the force between two wheels and the motor you’re still looking at 100kg of force to overcome steering.