Park FR-5.2GT Cassette Lockring Tool with 12 mm Guide Pin
Designed for the removal and installation of most cassette and disc brake lockrings with a 12-spline tool fitting, with a guide pin for added stability on thru axle hubs.
The FR-5.2GT sits in the drawer we open every day. Park Tool design and manufacture it in Minnesota; ProWheelBuilder is an independent wheel builder in Georgia and a Park stockist, not the manufacturer.
What it does
Before a rear wheel can be rebuilt the cassette has to come off, and the splines only forgive an exact match. The wrong remover slips and burrs the lockring.
Which size is this one?
This is the 12mm version. Park make this tool in several sizes and they are not interchangeable: one step too large rounds the fitting off, and on a tensioned wheel that means cutting a spoke out and rebuilding that section. Not sure which you need? Measure across the flats or send us a photo.
What Park say about it
- Designed specifically for use when removing and installing cassette lockrings on thru axle hubs
- Same tool pattern as the FR-5GT but with deeper splines for a greater range of compatibility
- Utilizes a 12mm guide pin to stabilize the tool in use
Specifications
| Model | FR-5.2GT |
|---|---|
| Park name | Cassette Lockring Tool with 12 mm Guide Pin |
| Type | Drivetrain tool |
| Size | 12mm |
| Brand | Park Tool |
About this listing
Sold here as a single tool. Unlike the rims and hubs we list, nothing gets built around it — it ships as it comes.
How we use it at ProWheelBuilder
Everything Park we stock is something we use ourselves. We would rather carry a short list we trust than a long one we have never opened. So if you are buying the FR-5.2GT to build or maintain your own wheels and you are not certain it is right for the job, ask us. We would rather point you at the correct tool than sell you the wrong one twice.
Park's kit is the industry default largely because it is documented. Their repair guides reference these exact tools, and they keep making them.
Park Tool's videos
Warranty
Park's warranty. Most Park Tool products carry a limited lifetime warranty against defects in material and workmanship. Pumps, stools, torque wrenches, electronic tools, motors and power supplies are covered for one year. Normal wear, misuse and damage from improper use are excluded.
ProWheelBuilder. ProWheelBuilder's one-year wheel warranty covers the wheels we build and does not apply to tools and accessories, which carry their manufacturer's cover.
Full terms are on our Policies & Warranty page.
FR-5.2GT questions
Do you ship tools on their own?
Tools ship alone, usually the same day the order lands.
Is this the right one for my wheels?
Tell us what you are working on and we will tell you straight. A drivetrain tool has to fit the part exactly; the wrong size does damage rather than work.
Not sure? Text or leave a voicemail on 470-253-0929 or email info@prowheelbuilder.com — you will be talking to the people who build the wheels.
