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.
Park Tool Company is an American designer, manufacturer and marketer of bicycle tools and equipment for both professional and home bicycle mechanics. It manufactures about 4000 products that range from wheel truing stands to hex wrenches.