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> The wheels spinning will behave as stabilizers, making it easier to stay on the bike.

Bicycle wheels do not have enough mass to impact handling through gyroscopic inertia. They do not act as stabilizers.

Motorcycle wheels do, and consequently they require more effort to lean at higher speeds as well as require additional lean when accelerating into a curve.

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https://youtu.be/8H98BgRzpOM?t=27s

Gyroscopic forces are not the dominant force keep a bicycle upright, this has been demonstrated with bicycles with counter-rotating wheels. Steering geometry of the front wheel is what self-stabilizes a bicycle.

It's not just one thing. At different speeds there are different things that help you stay balanced. At low speeds, yes, what you do with the handlebar and so the front wheel is predominant. At higher speeds gyroscopic forces do not actively keep you upright, but they help by slowing down the speed with which you loose you balance and so you have more time to react (by steering).

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