Park Tool BBT-79.3 Bottom Bracket Tool

The Park Tool BBT-79.3 Bottom Bracket Tool at J&R Bicycles allows you to easily install or remove certain threaded BBs that have 12-notch tool fittings. This convenient tool features a 3/8" drive that is ratchet/torque wrench compatible and when used with the Park Tool BBT-RS Bottom Bracket Tool Retaining System (sold separately) ensures consistent tension and full engagement to prevent the tool slipping. This tool works with 12-notch threaded BB tool fitting that have an outside diameter of 45-47mm and an inner measurement of 44mm, including SRAM BSA DUB, Race Face Cinch and more.