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Bottom Bracket Tool — 16-Notch Precision CNC-machined aluminum tool for the installation and removal of select threaded bottom brackets with 16-notch tool fittings, including Shima no® XTR® BB93, Dura-Ace® BB9000, and Token® bottom brackets. Features integrated threads for full compatibility with the Park Tool BBT-RS Bottom Bracket Tool Retaining System (sold separately). The BBT-RS uses an adjustable spring-based tension system to apply consistent, adjustable pressure to the tool, ensuring full engagement with the tool fitting and preventing slippage. Fits 16-notch threaded bottom bracket tool fittings with a major diameter (outside of notches) of 39-40 mm and a minor diameter (inside of notches) of 37.6 mm. Also fits chainring lockrings on Shimano® STEPS square spindle e-bike systems including: Attributes Bottom Bracket Type 39mm/16 notch Show more