Park Tool BBT-18 Bottom Bracket / Lockring Tool

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8-notch castle tool for select Octalink or ISIS bottom brackets, or more commonly now E-bike chainring lockrings on Specialized Levo and Bosch Performance Line CX motors. A heavy d uty, investment cast tool Includes 36mm wrench flats The BBT-18 replaces the previous model BBT-8 Made in the USA and covered by Park Tool's legendary limited lifetime warranty Show more