Park Tool DH-1 Dummy Hub Rear Wheel Replacement Tool Chain Cleaning

Park Tool DH-1 Dummy Hub

The Park Tool DH-1 Dummy Hub is an essential workshop tool that replaces the rear wheel while maintaining proper chain and drivetrain alignment. Designed for cleaning, service, transport, and drivetrain diagnostics, the DH-1 allows the bike to be pedaled and shifted with the rear wheel removed.

Ideal for chain cleaning machines, derailleur adjustment, and drivetrain troubleshooting, the DH-1 keeps tension on the chain and prevents derailleur damage when the wheel is out of the frame.

Features & Benefits

• Replaces the rear wheel during service
  Slides directly into the rear dropouts to hold the chain and drivetrain in position

• Allows pedaling and shifting
  Unique design enables full drivetrain operation with the wheel removed

• Protects derailleur alignment
  Prevents derailleur collapse or chain slack during cleaning or maintenance

• Perfect for chain cleaning & diagnostics
  Ideal for use with on-bike chain cleaners and drivetrain troubleshooting

• Shop-proven Park Tool construction
  Durable design built for daily professional use

Compatibility

✔ Chain Compatibility

• All multi-speed chains

• 1/8" single-speed chains

✔ Frame Compatibility

• Quick-release rear dropouts

• 12 mm thru-axle rear frames

Recommended Use

• Chain cleaning and degreasing

• Drivetrain diagnostics and adjustment

• Bike transport and storage

• Rear wheel removal during service

• Protecting derailleur alignment in the workshop

Why Choose Park Tool?

Park Tool tools are trusted worldwide by professional mechanics for their durability, precision, and thoughtful design. The DH-1 Dummy Hub is a workshop staple that simplifies maintenance while protecting expensive drivetrain components.

A simple but indispensable tool for clean chains, smooth shifting, and safe bike service—trusted by pros everywhere.