Unior Shimano / SRAM Cassette Lockring Tool — 1670.5/4

This is Unior’s basic cassette lockring tool for Shimano and SRAM-style cassettes. It’s a simple shop staple used with a chain whip and 1/2" ratchet to remove and install standard HG cassette lockrings. Key Functional Details Fits Shimano and SRAM HG-style cassette lockrings Designed for use with 1/2" drive ratchet or adjustable wrench Precision-machined splines for secure engagement Steel construction for durability Model: 1670.5/4 Compatibility & Technical Notes Compatible with Shimano and SRAM HG cassette lockrings Works with most road and MTB cassettes using HG interface Requires chain whip (or equivalent) for cassette removal NOT compatible with SRAM XD/XDR driver lockrings NOT compatible with Campagnolo cassettes NOT for Centerlock rotors Manual hand tool — not designed for impact drivers Service / Ownership Context This is a basic cassette service tool for drivetrain maintenance. Proper engagement helps prevent rounding aluminum lockrings during removal. Fit & Use Signals Good Fit: Home mechanics and shops servicing Shimano or SRAM HG cassettes. Not A Fit: Campagnolo drivetrains, SRAM XD/XDR systems, or riders looking for a trailside tool. This is your standard HG cassette tool. Nothing fancy, but it works. Biggest mistake: customers forget they also need a chain whip. This tool alone won’t remove a cassette. Second mistake: trying to use this on XD/XDR or Campy. Won’t fit. Always fully seat the tool before applying torque. Half engagement rounds lockrings fast. Most seized lockrings come from dry installs or over-torque. A little grease on reinstall saves headaches later. Failure points are user error: slipping adjustable wrenches, shallow engagement, or trying to impact it. Who this is really for: anyone doing cassette swaps at home or in the shop. Who should avoid: riders on SRAM XD/XDR or Campagnolo systems. Mechanic advice: hold cassette with proper chain whip, break lockring loose cleanly, and torque to spec on reinstall. Grease threads lightly.