Park Tool DH-1 Dummy Hub - QKDH1
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Product Information
Full details
The Park Tool DH-1 Dummy Hub is an essential maintenance tool designed for home mechanics and professional bike technicians who need a reliable way to hold chain tension while the rear wheel is removed. It excels at facilitating deep drivetrain cleaning and ensuring frame safety during transport; however, users should note that it is not intended for use while riding and must be manually installed in place of the rear wheel axle.
All features
| Model Part Number | QKDH1 |
|---|---|
| Brand | Park Tool |
Extended Product Information
FAQs
Can I ride my bike with the DH-1 installed?
No, the DH-1 is strictly a maintenance tool and is not designed to support the load of a rider.
Does it work with 12mm thru-axles?
Yes, the DH-1 is designed to be compatible with 12mm thru-axle dropouts.
Is this compatible with single-speed bikes?
Yes, it is compatible with 1/8 inch chains, which are standard for most single-speed applications.
Will I need extra tools to install it?
You will need the same tools required to remove your rear wheel (e.g., a quick-release lever or hex key for a thru-axle).
Does it work with disc brake bikes?
Yes, it functions regardless of the braking system, as it mounts to the dropouts where the wheel would normally reside.
Troubleshooting
The unit feels loose in the dropouts
Ensure that your quick-release skewer or thru-axle bolt is fully tightened to secure the DH-1 firmly against the frame.
Chain is skipping or noisy
Check that the chain is correctly seated on the DH-1 roller and that your derailleur limit screws are set correctly.
Pros and Cons
Pros
- Simplifies deep chain cleaning and derailleur adjustment
- Protects rear dropouts from damage during transport
- Fits both quick-release and 12mm thru-axle frames
- Allows for gear shifting without the rear wheel installed
Cons
- Not compatible with some specialized thru-axle standards without adapters
- Requires removing the rear wheel, which adds steps to quick cleaning jobs
- Not suitable for testing drivetrain load under power
Setup, Compatibility & Care
To install, first shift your chain to the smallest cog and remove the rear wheel. Align the DH-1 Dummy Hub with the dropouts and secure it using your existing quick-release skewer or thru-axle hardware. Once seated, the chain should rest naturally on the hub's pulley. For care, keep the unit free of excessive grit by wiping it down with a shop rag after use. If the unit becomes heavily soiled with chain grease, use a mild degreaser, rinse with water, and ensure it is fully dried before storing to prevent any potential oxidation.