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PARK TOOL: YOUR GUIDE TO THE WORLD OF CASSETTES & FREEWHEELS
CASSETTE OR FREEWHEEL?
To determine the type of rear sprocket system you have, find the tool fitting on the sprocket set. Spin the sprockets backwards. If the fitting spins with the cogs, it is a cassette system. If the tool fitting does not spin with the cogs, it is a freewheel system.
COUNT THE NOTCHES
To determine the type of freewheel tool needed, count the number of splines or notches and measure the outside diameter in the tool fitting. If there are 4 notches and the tool fitting is roughly 40mm across, the FR-6 is the correct tool.
THE RIGHT TOOLS FOR THE JOB
In addition to the correct tool, you will also need a method of driving it such as the Park Tool FRW-1 wrench, an adjustable wrench, or a 1" socket.
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FR-6 Freewheel Remover
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| Customer Reviews |
897
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387
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208
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3,595
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| Tool Fitting | 2 Notches | 4 Notches | 4 Notches | 4 Notches | 12 Internal Splines |
| Tool Fitting Measurement | 25mm Outer Diameter | 24mm Outer Diameter | 40mm Outer Diameter | 32mm Outer Diameter | 22.6mm Outer Diameter |
| Typical Brands & Models | older SunTour | SunTour (post-1986) | BMX / single-speed | BMX "flip-flop" hubs | Shimano, Sachs Aris, SunRace, DNP Epoch |
TRUSTED SINCE 1963
Since our origins in the back of a bike shop in 1963, it has been Park Tool's sole mission to design and manufacture high-quality tools that empower mechanics and riders of all skill levels to service their bicycles. Just like our other 500+ tools, our cassette and freewheel tools are a product of our decades of experience and expertise in the industry, in the shop and on the trail.
Chris
Reviewed in the United States on March 6, 2025
was able to take freewheel apart to clean bearings, durable steel, works well
Customer
Reviewed in the United States on August 5, 2024
Descent product.
Wes Miller
Reviewed in the United States on June 4, 2024
Worked perfect, not cheap quality. I used it twice and it will be last many uses, unlike junk quality
stephan
Reviewed in the United States on June 27, 2024
Nice price , fast shipping ! M
André Z.
Reviewed in Germany on June 24, 2024
Solides Werkzeug.
Extra Padang
Reviewed in the United States on May 26, 2024
I use this to remove the Shimano mx-30 freewheel as well as other freewheels with the same 4 notch dimensions. I hooked it up to a ratchet wrench by way of a 25mm socket.
james
Reviewed in the United States on March 30, 2024
This was very useful for replacing my freewheel. I most likely would have damaged my new one trying to put it on a different way.
patrick
Reviewed in Canada on March 27, 2024
Pretty sturdy tool and work for me .I used it to remove the freewheel on a Razor Sx500 electric dirt bike. Same as a mx350 and mx650
Maurizio
Reviewed in Italy on March 16, 2024
perfetto !
JOHN CARL SONENBERG
Reviewed in the United States on October 22, 2024
Just what I needed to pull off the freewheel on the bmx restoration project. Beats trying to beat the freewheel off with a screwdriver and hammer.
Brichet
Reviewed in France on March 23, 2020
Ras produit au top et reçu dans les temps
Manuel Polanco
Reviewed in Spain on February 1, 2018
Park Tool es calidad, pero hay cosas en las que no se aprecia tanta diferencia.Funcioinar funciona bien, ojo que hay otra herramienta similar para otro tipo de piñones, fíjate que valga para tu piñón
Bad Wolf
Reviewed in the United States on April 5, 2018
This is exactly what I needed to swap the old hub on my fixed gear bicycle. It’s got some weight to it and will likely last a very long time. In the end, I decided to purchase a whole new set of wheels, tires, and a brand new hub to change the overall appearance of my bicycle. This tool came in handy when I needed to install the new hub on the new wheels. Although you won’t find yourself needing this tool very often, this is still a tool you should have in your tool box to prevent / avoid damaging your bicycle wheels whenever you need to change out your hubs. Make sure to measure your hubs before moving forward with this purchase, or you’ll have more down time with your bike. Many of the tools and hubs look very similar, but they definitely come in different sizes. If this hub tool is the size you need for your bike, buy this one now! You’ll be happy you did.
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