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  • Park Tool GSC-1C GearClean Brush
  • Park Tool GSC-1C GearClean Brush Gear Cleaning Teeth
  • Park Tool GSC-1C GearClean Brush Bristles
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  • Detail Images - Gear Cleaning Teeth
  •  - Bristles
Park ToolGSC-1C GearClean Brush

Item # PAR0153

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Item # PAR0153

Keep your gears clean.

Get into the nooks and crannies of your drivetrain with Park Tool’s GSC-1C GearClean Brush. The curved, toothed end fits in between cassette cogs to free impacted grit, while the stiff bristles break up stubborn dirt.

Tech Specs
Tech Specs
This product can expose you to chemicals including DEHP, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
1sp to 30spd
Recommended Use

Reviews & Community


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Makes Cleaning Easy

  • Familiarity: I've put it through the wringer

There's nothing worse than having to go through each cassette cog with a towel to get the grime out. My life has been made easier with this brush. True, it's not crucial to have among your cleaning supplies, but seriously, get one if you want to save yourself some time and effort!

Great chain and cassette cleaning tool

  • Familiarity: I've put it through the wringer

I've had the same Park Tool Gearclean Brush for about 10 years now and it still does the trick. Yes, the brush bristles have seen better days, but they still work and the teeth on the back of the handle are still great for getting grime out of the rear cassette.

Brushy brush!

  • Familiarity: I've used it several times

Perfect for all those hard to reach spots. CLEAN YO BIKE! makes cleaning your bike sooooo much easier and a lot less frustrating.

The gear brush

    I've burned through a few of these. Perfectly designed for the job and priced right. Buy two.

    Scrubbed the rust off my chain

    • Familiarity: I've used it once or twice and have initial impressions

    I had a chain that was starting to rust. I got some dishsoap and water used this brush to clean the chain. It worked really well! All the rust is now gone! I haven't quite figured out how to use the other toothy end on my cassette yet... I gave it 4 starts due to the lack on instructions on how to properly use the toothy end.


      If you want to get your drivetrain shiny clean, this is the brush you'll want. The super stiff bristles agitate any sort of grease and grime off your gears. Obviously in conjunction with degreaser though. I find that if you do attack a particularly greasy part, the bristles will become impregnated with grease and you'll want a new brush after that. That applies for anything though.

      Perfect for cleaning between cogs!

      • Familiarity: I've put it through the wringer

      This brush is ideal for cleaning your cassette. It's inexpensive, durable, and works very well.

      Avg. ride time: 4h 23m per week
      • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

      The Best of the Bunch

      • Familiarity: I've put it through the wringer

      I have used a number of other dedicated chain brushes and decided to buy this one again due to it being simple cheap and effective. I like that the brush has a wider profile than some others, so it sweeps a wider section of the chain. On an older one I had to superglue the brush cartridge into the handle so it would not come out, it took a minute but solved the problem. On this one it seems like a tighter fit so it should not be an issue.

      Better than a toothbrush

        Not sure what to say other than it is certainly tougher and scrubs harder than your average toothbrush cleaning job.

        For Anyone that Owns a Bike

        • Familiarity: I've used it several times

        Do you own a bike? Yes? Get this. Clean your stuff and it will last longer. Not sure how to clean it? That's okay, check out Park Tool's website for plenty of at home maintenance tips.

        Essential tool for any home mechanic

        • Familiarity: I've put it through the wringer

        What really can be said. Picked this up as part of a maintenance build I was doing for my garage to be able to service my bike on the regular. Just like a wax scraper for the tune shop I have built for my skis and boards the chain brush is essential to any home shop. Get one today!

        Kyle Laudenslager
        Gearhead; Customer Account Manager

        Great for tough to reach spots

        • Familiarity: I've put it through the wringer

        Excellent and pulling out the grime in between cogs on your cassette or if you run mulitple chain rings up front.

        Must have tool!

          This brush is great for cleaning chains and cassettes! I never realized how dirty they were and these bristles get it very clean. It definitely ups the bar for post-ride bike cleaning sessions.

          Scrub a dub

          • Familiarity: I've used it several times

          Nice stiff bristles for getting the grime off the chain and cassette. Not great for trying to get into very tiny spots because, like I said, stiff bristles. Works great for its intended use though.

          My second one!

          • Familiarity: I've put it through the wringer

          I bought this brush to replace the one I wore out. Perfect for cleaning the cogs. I use Dumonde Tech lube on the chain, which can be messy. Pedro's Bio degreaser along with the Park chain cleaner and this brush makes for a quick and thorough cleaning of the drivetrain.


          • Familiarity: I've used it several times

          Arrived super fast. Thanks BC! This tool is exactly what I need to clean my bike! It's great so far, no issues.


          • Familiarity: I've used it several times

          Pretty stoked on such a simple piece. I've historically been someone who doesn't keep my bike super clean. But having this brush makes scrubbing down my cassette after every few rides a quick and easy ritual.

          Greasy Grimy Gopher Guts

            A clean drivetrain shifts better. Clean all those little ramps on your cassette that your chain rides as it moves across the gears. You'll thank yourself on your next variable climb.

            Greasy Grimy Gopher Guts


            • Familiarity: I've used it once or twice and have initial impressions

            Nice to have tool to give the cassette a deep clean or quick once over. Good quality, as expected.