Park Tool BBT-59.3 External Bottom Bracket Socket - CNC Aluminum, Fits Shimano Ultegra & Deore XT Type_Bolt-On - C-Boost SRS Carbon Sole:

- C-Boost SRS Carbon Sole: Made from the latest generation carbon fiber

The smooth anodized finish not only enhances corrosion resistance but also provides a sleek

Designed with the angler in mind

- 3-pawl freecoaster hub for quick engagement and smooth fakie tricks

making it a versatile upgrade for riders seeking to improve their setup

Park Tool BBT-59.3 External Bottom Bracket Socket - CNC Aluminum, Fits Shimano Ultegra & Deore XT Type_Bolt-On - C-Boost SRS Carbon Sole:A precision CNC machined aluminum tool for the installation and removal of select threaded bottom brackets with 16 notch tool fittings . Fits 16 notch bottom bracket tool fittings with a major diameter of 41 42mm and a minor diameter of 39mm . 3 8" drive compatibility Fits 16 notch threaded bottom bracket tool fittings with a major diameter (outside of notches) of 4142 mm and a minor diameter (inside of notches) of 39 mm Fits Shimano Ultegra BBR60,