Park Tool FR-5.2 — Cassette Lockring Tool

The FR-5.2 is engineered to fit the most common tool fittings on 7- to 12-speed cassette lockrings, including Shimano®, SRAM®, and other popular brands. Its thin-wall construction allows use without removing cones or locknuts, while the 1" hexagonal base works with a socket, wrench, or bench vise. Made from heat-treated alloy steel, it’s built for a lifetime of reliable use.

Features

• Fits 12-spline tool fittings, approx. 23.4 mm outer diameter

• Compatible with cassette lockrings from Shimano®, SRAM®, SunRace®, SunTour®, Chris King®, and others

• Fits disc brake lockrings and lockring adapters with 12 internal splines

• Compatible with top caps of select Rock Shox® forks: Pike®, Lyrik™, SID®, Revelation™, Reba®, Paragon™

• Center bore 12 mm for axle clearance

• Thin-wall design allows use without removing cones or locknuts

• Made from heat-treated alloy steel for long-lasting durability