Park Tool Campagnolo Bottom Bracket Tool There is only one right way to remove your Campagnolo bottom bracket and freewheel. That is to have a Park Tool BBT-5/FR-11. It is made ofheat treated alloy tool steel and has a one inch base for use with a wrench or bench vise. Thin wall construction allows use without removal of cones and locknuts. 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 Related Articles: CASSETTE AND FREEWHEEL REMOVAL AND INSTALLATION Manufacturer's Part No: BBT-5/FR-11UPC: 763477003515 | Park Tool | Bbt-5/fr-11C Bb/cassette Tool Bbt-5/fr-11C, For Campagnolo