Bicycle dynamics

For the engineering and physics geeks out there, here's a Wikipedia article on Bicycle and Motorcycle Dynamics that describes the science of the motion of bicycles and motorcycles. It is concerned with the motions of bikes, their parts, and the forces acting on them.

And in blog post, former bicycle framebuilder Dave Moulton explains the mechanics of steering a bicycle.

For my U.S. and Canadian readers, enjoy your three day weekend. Turn the computer off, go out and ride your bike!
Photo info: No hands! by photoblue.