Park Tool Dummy Hub One Color, One Size

Commonly known as a Dummy Hub, the Park Tool DH-1 Dummy Hub slides into the rear dropouts and replaces the rear wheel, so you can easily clean your chain and transport your bike with your rear derailleur and chain secured in place. It's compatible with all rear derailleurs and 1/8-inch chains, as well as working with both open dropout and 12-millimeter thru-axle frames.