Cat wheel Exerciser.
Wheel exercisers are no longer exclusive to hamsters and underground human test subjects with the arrival of the Cats Wall's Wheel (because cats need to exercise to). It is made using a bicycle wheel but instead of rubber tires you get a 47.2 inches wooden drum. This fixture doesn’t take up much space, it is 10.6 inches wide and is able to hold the combined weight of two adult cats at once (55 lbs.). A similar model with a stand is also available.