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Why doesn't the bike fall if going with a high speed?

How does a bike stay upright? I know there are various theories involving castor effects, and gyroscopic motion but as far as I'm aware no one knows for certain how a bike stays up right.

What is the best theory right now?

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marked as duplicate by Qmechanic, Mark Eichenlaub, David Z Jan 30 '12 at 19:10

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
see here for answer –  Jack Jan 30 '12 at 14:49

1 Answer 1

The paper here clearly answers most of your questions.

The title is apt which states

A Bicycle Can Be Self-Stable Without Gyroscopic or Caster Effects

http://www.sciencemag.org/content/332/6027/339.abstract

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