Park Tool FR-5.2G Cassette Lockring Tool

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Cassette lockring tool with 5mm guide pin
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A version of the dependable FR-5.2 with an added 5mm guide pin for added stability when removing lockrings from quick-release hubs. Designed for 12 spline 23.4mm diameter tool fittings - the most common tool fitting found on 7-12 speed cassette lockrings, and can also be found on some disc brake lockrings. Made from heat treated alloy tool steel.


  • Fits 12-spline cassette lockrings from Shimano, SRAM (including 1x), SunRace, SunTour, Chris King and others
  • Fits most disc brake lockrings with 12 internal splines from Shimano and other brands
  • Hex-shaped base of tool fits 1" (25.4 mm) socket or wrench
  • 5mm guide pin stabilizes tool when used with quick-release hubs
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