An ordinary bicycle wheel is altered by the addition of lead around the rim. The wheel makes a good gyroscope for demonstrating precession (hang the spinning wheel from one handle) or conservation of angular momentum (turn the spinning wheel while seated on our spin stool.)

We have recently added a two-wheel system, mounted on a common axis. Imagine the possibilities!

This demo can be found along the back wall of the UCSD PUL Demo Room (WLH 2015).