Park Tool FR-5.2GT Cassette Lockring with Tool 12mm Pin
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Luis G.
> 3 dayWorks. Feels solid. Guide pin is nice. Works for cassette removal and direct mount Shimano rotor removal install.
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Uriel Cuevas
Greater than one weekGood value
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GS
> 3 dayQuality product. Needs a 1” tool. I used a socket. Would have preferred that it fit directly on my socket wrench.
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kw-2wheel
> 3 dayAnother solid product from Park tool
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Hines
> 3 dayThese are great tools. If you want the Best Buy his for thru axles
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Doug Perrenoud
> 3 daySo this is the 4th version of this tool that I have purchased and like all of the others, it is an improvement over my prior ones. Well, to be clear, it works well for wheels with thru-axle hubs only - I will definitely keep my other tools for my bikes with conventional axles and skewers. It also works well for removing centerlock disc rotor lockrings. Considering what I paid for my new bike with all the new tech, I figure an additional $14 for this modified tool is a reasonable investment.
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mkuliska
> 3 dayThis tool is needed for my cassette removal and installation
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Dennis Santos
> 3 dayMust have tool for those with centerlock disc brakes durable and greqt brand
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C. Goulet
> 3 dayI had to remove my rear cassette to upgrade my hub on my Shimano 11-34 GRX, and no other tool would fit. Soviet-era tough, just like every other Park Tool item. Fits perfectly in the largest of their sockets, and with the torque wrench, it now has the correct tightness of fit down to the Nm rating on the gears. If you like tinkering with your bike, and saving money on maintenance, this is a great addition to your kit. Happy riding.
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R. Argue
10-06-2025Who can torque to 40Nm with a 1 box wrench? And who can be bothered to use a chain whip when an impact driver will take a cassette lockring off in half a second without even needing to hold the cassette? This tool would be great if it directly supported 1/2 drive, but requiring a 1 socket to adapt this to anything makes it way less useful.
PARK TOOL: YOUR GUIDE TO THE WORLD OF CASSETTES & FREEWHEELS
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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. |
CAMPAGNOLO OR NO?If you have a multi-speed cassette, you need one of two tools. If the cassette, derailleur, or shifter are labeled with Campagnolo, the tool for you is the BBT-5/FR-11. Otherwise, you will require a tool in our FR-5.2 line. |
THE RIGHT TOOLS FOR THE JOBIn addition to the correct tool, you will also need a method of driving it (such as an adjustable wrench or 1" socket) as well as a chain whip to hold the cassette in place as you remove the lockring. Park Tool makes a full line of chain whips and wrenches for this very purpose. |
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| FR-5.2 Lockring Tool | FR-5.2G Lockring Tool w/ 5mm Guide Pin | FR-5.2GT Lockring Tool w/ 12mm Guide Pin | FR-5.2H Lockring Tool w/ Handle | BBT-5/FR-11 Lockring Tool | FR-1.3 Freewheel Remover | |
| Tool Type | Cassette Lockring/Disc Brake/Suspension Fork Top Cap | Cassette Lockring/Disc Brake | Cassette Lockring/Disc Brake | Cassette Lockring/Disc Brake/Suspension Fork Top Cap | Cassette Lockring/Bottom Bracket | Freewheel |
| Tool Fitting | 12 Internal Splines | 12 Internal Splines | 12 Internal Splines | 12 Internal Splines | 12 Internal Splines | 12 Internal Splines |
| Tool Fitting Measurement | 23.4mm Outer Diameter | 23.4mm Outer Diameter | 23.4mm Outer Diameter | 23.4mm Outer Diameter | 22.8mm Outer Diameter | 22.6mm Outer Diameter |
| Typical Brands & Models | Shimano, SRAM, SunRace, SunTour, Chris King, etc. cassettes, Shimano disc brakes, Rock Shox suspension fork top caps | Shimano, SRAM, SunRace, SunTour, Chris King, etc. cassettes, Shimano disc brakes | Shimano, SRAM, SunRace, SunTour, Chris King, etc. cassettes, Shimano disc brakes | Shimano, SRAM, SunRace, SunTour, Chris King, etc. cassettes, Shimano disc brakes, Rock Shox suspension fork top caps | Campagnolo | Shimano, Sachs Aris, SunRace, DNP Epoch |
| Additional Features | Guide pin for quick-release style hubs | Guide pin for 12mm thru-axle hubs | Built-in handle |
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.