Park Tool FR-5.2 Cassette Lockring Tool
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 and Rock Shox® suspension fork top caps. Made from heat treated alloy tool steel. Thin wall construction allows use without removal of cones and locknuts.
Fits most disc brake lockrings with 12 internal splines from Shimano® and other brands
Fits the top cap of some Rock Shox® suspension fork models including Pike®, Lyrik™, SID®, Revelation™, Reba®, and Paragon™
Hex-shaped base of tool fits 1" (25.4 mm) socket or wrench
Center bore for axle clearance is 12mm
Always use a skewer or axle nut to hold tool firmly in place during removal and installation