The German Wheel (or ‘Rhoenrad’) was invented in 1925 by Otto Feick. It is a double rimmed wheel with foot boards, handles and rungs.
There are three categories of moves that can be performed on a German wheel: straight line, spiral and vault. Exercises can be performed without bindings and without hands.
Straight line exercises are as they sound; exercises where the wheel moves in a straight line and the gymnast is inside the wheel.
In vault exercises, the gymnast vaults over the top of the wheel while the wheel itself moves in a straight line.
In spiral exercises, the gymnast manouvers the wheel onto one rim and performs spinning exercises in a manner that looks something like a spinning coin.