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Park Tool GSC-4 Cassette Cleaning Brush

Park ToolGSC-4 Cassette Cleaning Brush(Return to Product Page)

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(15 customer reviews)
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User submitted reviews

Review by BikeLA45

If you already have a GSC-1, this is a useful addition
by BikeLA45
Cycling Enthusiast
Los Angeles, CA

I have used Park Tools' GSC-1 Gearclean brush for years, and it does a good job on chains, chainrings and cassettes. The GSC-4 is more specific to the cassette - it's wider, and the bristles are angled and contoured for that single purpose, so it's more efficient for that purpose.

I did have to figure out the best way to use it. The angle makes it "one-way" (hold in your right hand while standing behind the wheel). If the wheel is off the bike, it will only work on the push. On the pull, the cassette will simply spin. And I do prefer to use it with the wheel off, since otherwise the chain is in the way. Bottom line - if your cassette is dirty, this brush together with the right cleaner/degreaser will quickly get it clean.

Reviewed 2/22/2024
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Review by VTCyclist

Great Brush for Cassettes
by VTCyclist
Competitive Racer
1 of 1 customers found this review helpful.

This makes cleaning a grimy, dirty cassette much easier. It is shaped nicely to rotate the cassette on the wheel while keeping the brush still, or doing it the other way around. Whatever your preference this brush does a great job cleaning it up!

Reviewed 11/10/2022
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Review by Jerry

Best bike brush for the cassette
by Jerry
Cycling Enthusiast
SW Florida

Park Tool quality. Stiff but flexible enough for the deep clean and so far hasn't frayed out like the thinner more common cassette cleaning brushes. My cassettes and chainrings have never been shinier! Who new a brush could bring so much happiness.

Reviewed 8/25/2023
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Review by Anonymous

Good tool
by Anonymous
Cycling Enthusiast
San Diego

A quick easy way to get the dust off your cassette, a couple of minutes of brushing will rid your dust. I also use it to quickly brush off my derailleur wheels and chain when I don�t have time to throughly clean my drive chain.

Reviewed 8/17/2023
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Review by MG_CHI1

Required Tool for Proper Cassette Cleaning
by MG_CHI1
Cycling Enthusiast
Chicago, IL

Absolutely perfect for getting all the grime out of your cassette and derailleur rollers! Spray with your soap and water solution or bike cleaning product of choice and spin the pedals. The angle on the brush works it's magic and really cleans well. The bristles are stiff an durable. I use a bio based cleaner with this brush that's a little more than just soap but it cleans very well and then easily rinses out. I wish I had this product a while a long time ago. This is FAR better than a tooth brush or other softer brush you might have laying around.

Reviewed 6/27/2022
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Review by Ron

Nice brush for removing a lot of gunk quickly.
by Ron
Competitive Racer
Ann Arbor

I've got the other Park Tool for cassette cleaning (narrow brush on one end, plastic teeth on the other) and I'd compare two by saying this brush is the toothbrush and the other is the floss. This brush is great for getting a lot of gunk/dirt off the cassette quickly. I've been waxing my chain so I don't get a lot of oily build up on the cassette any longer, but I can accumulate a lot of dust/mud gravel riding. This brush quickly removes a lot of that gunk where it matters, i.e., where the cassette actually touches the chain. The deeper area between the cogs can wait for when I'm doing a major mid-season cleaning.

Reviewed 5/19/2022
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Review by CaptainPico

Good concept, unidirectional, bristles do not remain in original location
by CaptainPico
Cycling Enthusiast
PIco Rivera, CA
1 of 1 customers found this review helpful.

After the first use and storage the bristles were not straight. Maybe my fault for how it was packed with my other cycling tools. It performed okay, but its unidirectional for a right handed person. I typically use the edge of a rag to clean in-between my cogs if I am not removing them for a complete thorough cleaning. The brush helps remove the larger contaminants but I still had to use the rag after.

Reviewed 2/24/2023
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Review by Casual Cyclist

Well Made
by Casual Cyclist
Casual Cyclist
Grand Rapids MI

Well-made brush. I expect it to be durable. Functional design.

Reviewed 2/9/2023
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Review by Eee Zee

A brush
by Eee Zee

Pretty straight forward. A brush to clean your rear cogs. Simple, affordable and effective.

Reviewed 8/29/2023
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Review by Paul

by Paul
Boerne, TX

Brush is dished for better contact on the cassette and other parts.

Reviewed 8/10/2023
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Review by Cesar4

Awesome brush
by Cesar4

This the best brush to clean the cassettes and get that grime and dirt off. I use it on my wheels as well and it works perfect.

Reviewed 6/20/2022
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Review by Anonymous

Great Product.
by Anonymous

The bristles are contoured to follow the shape of the cassette and allows for cleaning while it is still on the wheel. Easy to use.

Reviewed 4/11/2022
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Review by Anonymous

Works better than expected
by Anonymous
Cycling Enthusiast
SF BAy Area

Use for cleaning cassette, works Great with MucOff. Just spray and brush off - clean as a whistle. No more using toothbrush.

Reviewed 2/28/2022
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Review by Tony M

Another Good One from Park
by Tony M
Cycling Enthusiast
New Jersey

Very well designed brush - typical of Park Tools!

Reviewed 2/22/2022
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Review by Rainman737

Does the Job nicely
by Rainman737
Cycling Enthusiast
Camarillo, CA
1 of 1 customers found this review helpful.

Great for any bike but mtb's in particular.

Reviewed 2/17/2022
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