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 1.1 The Torso-Arms-Handlebar mechanism:

According to this theory, the torso, the arms and the handlebar constitute a mechanism:

It's not obvious, but the rider’s torso leaning right or left controls the orientation of the handlebar.
If the torso leans to one side, the handlebar is oriented towards the opposite direction,
simply because one arm pushes on one side while the other pulls on the other side of the handlebar.

The rider can fool this mechanism and the arms or elbows may flex, but the mechanism is natural, basic, smooth and proportional. The more you lean, the more the handlebar is oriented towards the opposite direction. The handlebar is not being pushed in a jerky fashion and the mechanism acts automatically without being noticed.

 

 

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