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

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

Park Tool BBT-5/FR-11 Bottom Bracket / Cassette Lockring Tool insertion into Campagnolo® cassette lockring, click to enlarge

Park Tool BBT-5/FR-11 Bottom Bracket / Cassette Lockring Tool removing Campagnolo® cassette lockring, click to enlarge

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Item # BBT-5/FR-11

/ Tools / Cassette & Freewheel / Crank & Bottom Bracket

Bottom Bracket / Cassette Lockring Tool

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

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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 the Instructional Videos section.

Instructional Videos

Determining Cassette/Freewheel Type & Tool "Do I have a cassette or a freewheel?" This video gives the answer. It also helps determine which tool is needed for removal and installation.