Park Tool FR-5.2GT Cassette Lockring with Tool 12mm Pin
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matthew anderson
> 3 dayWorks good no issues
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Zephyr23
Greater than one weekNice Item!!!
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Mrs. Dianna Willms
> 3 dayI used this to install an 11-speed cassette on a boost size hub with a Shimano HG driver. The hub uses a thru-axle. Nice tool.
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Easton Pal
> 3 dayVery sturdy, but the guide pin did not fit my cassette (my fault). I contacted Park Tool and was informed that you can just hammer out the guide pin (which I did) and it worked great.
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Kenneth M. Morris
03-06-2025Quality tool works well
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Robert Minnicks
> 3 dayFits really good into the axel.
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GMS
> 3 dayUse it on my cassette and one up EDC steer tube tool
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Bnar
> 3 dayWorks great
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ramon d.
05-06-2025it works, but for the price I think they couldve figured out by now to make it more handy... like idk, not needing an onch socket or an awkward big ass crescent wrench. would be really nice if this could just be direct onto a socket wrench.
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Brad
> 3 dayThis is a handy tool for mountain bikers.
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.