Park Tool BBT-18 Bottom Bracket and Lockring Tool - 8-Notch C-class Thread the lock nut onto

Thread the lock nut onto valve stem

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Bolt Circle Diameter: Thread Mount

tablet or laptop to your sportwatch

Park Tool BBT-18 Bottom Bracket and Lockring Tool - 8-Notch C-class Thread the lock nut ontoThe BBT 18 is a heavy duty investment cast tool for removing and installing components with an eight notch tool fitting, including select cartridge bottom brackets, as well as chainring lockrings on some e bike drivetrains. Specifications Installs and removes components with eight notch tool fittings, including Shimano Octalink drive side bottom bracket cups with external notches, ISIS Drive bottom bracket cups (including Truvativ and Bontrager),