On: Why did we wait so long for the bicycle? (2019)

[Lio]

You could disprove that by letting a bike, without rider, roll down a slope.

If it rolls oriented forwards it will stay upright by itself because of the steering.

If it rolls oriented backwards it falls over because the steering now pushes it off balance.

If the gyroscopic force was the most important thing keeping it upright it wouldn't matter which orientation you let it roll.