Park Tool BBT-5/FR-11 — Campagnolo® Bottom Bracket & Cassette Lockring Tool
The BBT-5/FR-11 is a professional-grade tool designed for precise removal and installation of Campagnolo® cassette lockrings and cartridge bottom brackets. Made from heat-treated alloy tool steel, this durable tool ensures long-lasting performance and reliability. Its 1" (25.4 mm) tool fitting allows use with adjustable wrenches, sockets, or a bench vise for secure, controlled operation.
Features
Compatibility:
Fits all Campagnolo® cassette lockrings
Fits Campagnolo® cartridge bottom brackets, including Chorus® and Centaur®
Tool Profile: 12-spline, approx. 22.8 mm OD
Drive Size: 1" (25.4 mm) socket or wrench compatible
Construction: Heat-treated alloy tool steel for durability and precision
Note: Not interchangeable with Park Tool FR-1.3, FR-5.2, or FR-7 — each tool fitting has a unique profile
This tool is essential for mechanics and cyclists working on Campagnolo® drivetrains and bottom brackets, providing secure engagement without damaging components.

