The DH-1 Dummy Hub slides into the rear dropouts of a bicycle frame and replaces the rear wheel, keeping the chain in place while the wheel is removed for cleaning, service, or transportation. The unique design allows the bicycle to be pedalled and the derailleur to be shifted, making the DH-1 an essential tool for chain cleaning or diagnosis of drivetrain issues. Also called a “sleeping hub" the DH-1 fits into a frame's rear dropouts to replace the rear wheel for chain cleaning and transport The unique design allows shifting with the DH-1 installed Works with all derailleur and 1/8 inch chains Works on frames with both open-type dropouts and 12 mm thru axle dropouts