Park Tool FR-5.2GT Cassette Lockring with Tool 12mm Pin
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BXC
Greater than one weekWorks great, no need to try to keep in in place w the axle when loosening.
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jim
> 3 dayWorks exactly as designed
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August West
> 3 dayIve been using old Park cassette tool for QR axles and although it works, the tool was always getting cocked sideways in the lock ring since it was made for a quick release skewer. This tool works great for my 12mm thru axles and stays nice and square to the lock ring. One note, I always used a 24mm socket with my old tool but this new requires a 1 socket, the 24mm was too small.
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R. Argue
> 3 dayWho 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.
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Donna
> 3 dayIts PARK TOOL...nuff said
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Rob B.
> 3 dayOverall a solid design. To get the proper torque I used a 1in dewalt 1/2 impact socket and a 1/2 torque wrench. Zero issues, and Muhammad better with todays thru axles having the 12mm stud.
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MPach
> 3 dayThey just work and are solid construction.
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Cortney Hegmann
> 3 dayQuick delivery. Tool works great
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Jim K.
07-06-2025I bought this specifically to work with the 12mm thru axle on my Surly ECR that came installed with the NX Eagle cog set. Its the best way for me to use a torque wrench and snug the cassette to 40NM. Works perfectly!
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William D. Skinner
01-06-2025Perfect tool to install my Sram cassette. Park Tool makes quality products
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.