Park Tool Dummy Hub

Also called a sleeping hub, the DH-1 slides into rear dropouts and replaces the rear wheel for chain cleaning and transport. The DH-1 works with all derailleur and 1/8" chain. The unique design allows the bike to be shifted and works with open dropout and thru-axle frames up to 12mm.

WARNING: California Proposition 65

This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.

https://cambriabike.com/pages/warning-california-proposition-65