How do you put this on? Is it tricky or difficult for a non-technical person?

It's easier, actually, than putting on your rear wheel. Just get the chain in the roller wheel of the device, slide it into the rear chain stay dropout, then lock the quick release lever. If you want more or less tension in the chain you can simply adjust your rear derailleur to lower or higher gear and rotate the crank.

i have one. no need if you have a thru axle. simply use an old adhesive bandage spool and your thru axle. I use mine mostly for transport

That would definitely work too!

Is there a bearing in the contraption, or does the plastic wheel just spin on the axle?

No bearing; although, otherwise well made. The plastic wheel spins on a metal axle. The chain rides on the plastic wheel which is free to move sideways when shifting gears. This makes it easier to clean the derailleur linkages as well as the chain.

Will it work on my 6KU track bike?

Probably. It's designed to work with quick release axles. Your bike as bolt on axles. It will not work with thru axles. It is adjustable for the thickness of the drop out. If you still have the factory bolt on axles , you'd have to undo the bolts with a wrench, remove the rear wheel and then use this hub. To put the wheel back on, you'd do the reverse. If you're not familiar with the terms "quick release axle", "bolt on axle", "bicycle drop out" a quick search of Youtube should help. You could also show take your bike to a local bike shop, show them a pic of this item and ask them if it would work.

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⚙️ Shift, clean, and roll like a pro—your bike’s new best friend!

FRAME FRIENDLY DESIGN - Fits both open dropout and thru-axle frames up to 12mm, adapting to your ride.
LIGHTWEIGHT DURABLE - Crafted from aluminum, it’s built to last without weighing you down.
UNIVERSAL COMPATIBILITY - Works flawlessly with all derailleur and 1/8" chains for ultimate versatility.
EFFORTLESS CHAIN CLEANING - Replace your rear wheel with the DH-1 and clean your chain without hassle.
SEAMLESS SHIFTING ON THE GO - Keep your bike in gear even when the rear wheel is off—no compromises.

The Park Tool DH-1 Dummy Hub is a precision-engineered aluminum hub replacement that slides into rear dropouts, allowing cyclists to clean their chain or transport their bike while maintaining full shifting functionality. Compatible with all derailleur and 1/8" chains, and designed to fit open dropout and thru-axle frames up to 12mm, it’s an essential tool for maintenance and transport.

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Product Dimensions	6"L x 3"W x 3"H
Manufacturer	Park Tool
UPC	751738442043 789692467383 763477101105 763477174970 763477002709 744288866179 763477101037 784427670557 783761028802 696735952396 736557323780
Global Trade Identification Number	00763477002709
Item Package Dimensions L x W x H	9.84 x 3.19 x 1.77 inches
Package Weight	0.1 Kilograms
Item Dimensions LxWxH	6 x 3 x 3 inches
Brand Name	Park Tool
Suggested Users	All Ages
Number of Items	1
Part Number	373-241
Model Year	2018
Outer Material	aluminum
Size	One Size
Sport Type	Cycling

Park Tool DH-1 Dummy Hub

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