Splined side of Park Tool BBT-5/FR-11 Bottom Bracket / Cassette Lockring Tool, click to enlarge
More Images

Item # BBT-5/FR-11

/ Tools / Cassette & Freewheel / Crank & Bottom Bracket

Bottom Bracket / Cassette Lockring Tool — Campagnolo®

Heat treated alloy tool steel, one inch base fits wrench or bench vise. Thin wall construction allows use without removal of cones and locknuts.

View Product Details

BBT-5/FR-11 Features

  • Fits all Campagnolo® cassette lockrings
  • Also fits Campagnolo® Record™, Chorus™, Centaur™, and Athena™ bottom brackets
  • The outside diameter of the BBT-5/FR-11 is 22.8mm and has 12 splines
  • Always use a skewer or axle nut to hold tool firmly in place during removal and installation
  • Center bore for axle or spindle clearance is 16 mm

NOTE: To determine your cassette / freewheel type and the appropriate tool for it, please see Determining Cassette / Freewheel Type.

Product Fitment

Below is a filterable table of bottom bracket models the BBT-5/FR-11 is compatible with. For a full list of tool compatibility, see our Bottom Bracket Tool Finder.

Campagnolo® Threaded Centaur®
Campagnolo® Threaded Chorus®

Parts & Accessories


Bottom Bracket Tool Retaining System