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Merlin Cycles£11.50Visit shop Unior Tools Black Unior Cassette Removal Tool - / Shimano / Hyper Glide
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The Unior Cassette Lockring Tool (MC0D45800001) is designed for professional mechanics and dedicated home enthusiasts who need a reliable, high-precision solution for removing and installing cassette lockrings. Its primary benefit is broad compatibility with major drivetrain systems, providing a secure fit that prevents damage to components; however, users should note that the tool requires either a 1/2-inch drive ratchet or a 21mm spanner to operate effectively, as it does not come with an integrated handle.
| Model Part Number | MC0D45800001 |
|---|---|
| Brand | Unior |
No, you should only use a manual 1/2-inch ratchet or a 21mm spanner to avoid damaging the tool or the lockring.
Yes, many center-lock rotor lockrings use the same spline pattern as standard Shimano cassettes and are compatible with this tool.
No, this is a socket-style tool that requires a separate 1/2-inch ratchet or a 21mm wrench to operate.
No, fixed-gear lockrings typically require a specific hook-style tool, not a splined cassette tool.
Keep it clean and dry after use. There is no special maintenance required beyond standard storage in a dry environment.
Ensure the quick-release skewer or thru-axle is fully removed. If the tool is still slipping, check the splines for debris or damage and ensure the tool is seated perfectly flush against the lockring.
Verify that your cassette system is compatible. While this tool covers most standards, ensure you are not attempting to use it on a proprietary system or a damaged lockring with worn-out splines.
To use the tool, simply insert the splined end into the cassette lockring. Ensure the tool is fully seated before applying force to prevent deformation of the alloy lockring teeth. If you are using a 1/2-inch ratchet, snap it into the center square drive opening. If you prefer a spanner, use a high-quality 21mm wrench on the external flats of the tool.
Compatibility covers the vast majority of standard mountain and road bike cassettes, including those from Shimano, SRAM, and Sun Race. After use, clean the splines of any metal shavings or road grit. While the tool is coated for corrosion resistance, keeping it in a dry toolkit will ensure the longevity of the metal finish. Do not use this tool with air-powered impact wrenches, as the force can exceed the design tolerances of the lockring splines.
