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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Description

⚙️ Elevate your bike care game — don’t just clean, dominate the ride!

BOUNCE FREE STABILITY - Prevents unwanted bouncing on the chainstay, delivering a smooth, professional-grade cleaning experience.
LIGHTWEIGHT DURABLE - Crafted from robust metal at just 118g, combining portability with long-lasting performance.
YEAR ROUND ESSENTIAL TOOL - A must-have cycling accessory designed for consistent use, whether for maintenance or transport.
OPTIMIZED CHAIN COMPATIBILITY - Engineered to accommodate chain widths up to 6.8mm, ensuring broad bike compatibility.
SEAMLESS REAR WHEEL REPLACEMENT - Slides effortlessly into rear dropouts to mimic your rear hub for hassle-free chain maintenance.

The Park Tool DH-1 Dummy Hub Tool is a precision-engineered metal accessory that replaces your bike’s rear wheel in the dropouts, enabling efficient chain cleaning and transport. Compatible with chains up to 6.8mm wide, it stabilizes the chainstay to prevent bouncing, making maintenance smoother and more professional. Lightweight at 118g and designed for year-round use, it’s an indispensable tool for serious cyclists aiming to keep their drivetrain in peak condition.

Specifications

Product dimensions	15.2L x 7.6W x 7.6H centimetres
Manufacturer	PARK TOOL
UPC	751738442043 789692467383 763477101105 763477174970 763477002709 744288866179 763477101037 784427670557 783761028802 696735952396 736557323780
Global Trade Identification Number	00763477002709
Color	blackone
Size	One
Style	Cycling
Material composition	100
Weight	118 g
Material type	Metal
Number of items	1
Number of pieces	1
Power source	ac
Seasons	Year-round
Sport	Cycling
Included components	power tools
Batteries included?	No
Department	Cycling
Item model number	DH-1
ASIN	B00NQ9H6JK

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