The invention relates to suspension systems comprising, in certain embodiments, a pivoting means concentric to a wheel rotation axis so that braking forces can be controlled by placement of an instant force center, and so that acceleration forces can be controlled by a swinging wheel link.

 
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< Bicycle frame

< Coaxial two-wheel vehicle

> Self-propelled vehicle propelled by an elliptical drive train

> Ratchet-action drive mechanism for human power

~ 00608