Park Tool BBT-79.3 Bottom Bracket Tool

Park Tool BBT-79.3 Bottom Bracket Tool Park Tool

Park Tool BBT-79.3 Bottom Bracket Tool

Park Tool BBT-79.3 Bottom Bracket Tool

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What does the Park Tool BBT-79.3 Bottom Bracket Tool fit?

The Park Tool BBT-79.3 is a precision CNC-machined aluminum bottom bracket tool for the installation and removal of 12-notch threaded bottom brackets, including SRAM BSA DUB, Race Face Cinch, Rotor BSA30, Zipp Vuma, Hawk Racing BB3086, and others with a major diameter of 45 to 47mm and a minor diameter of 44mm. The anodized aluminum body is easy to identify in a tool drawer and features a ratchet and torque wrench-compatible 3/8-inch drive. The BBT-79.3 also includes integrated threads for full compatibility with the Park Tool BBT-RS Bottom Bracket Tool Retaining System, which applies consistent spring-based tension to keep the tool fully seated during installation and removal.

Manufactured in-house by Park Tool, the BBT-79.3 is the shop-grade solution for modern threaded BB standards that use a 12-notch interface with the specific diameter range it covers. If your bottom bracket is not on the compatibility list, confirm the notch count and outer diameter before ordering, as different brands use different tool engagement dimensions even within the 12-notch category.

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$30.95
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Specs

Material: Precision CNC-machined aluminum, anodized

Drive: 3/8-inch, ratchet and torque wrench compatible

Notch Count: 12-notch

Major Diameter: 45-47mm (outside of notches)

Minor Diameter: 44mm (inside of notches)

Compatible Standards: SRAM BSA DUB, Race Face Cinch, Rotor BSA30, Zipp Vuma, Hawk Racing BB3086

BBT-RS Compatible: Yes (integrated threads)

MPN: BBT-79.3

FAQ

How does the BBT-79.3 differ from the BBT-47?: The BBT-79.3 fits 12-notch bottom brackets with a major diameter of 45-47mm and a minor diameter of 44mm, including SRAM BSA DUB, Race Face Cinch, Rotor BSA30, Zipp Vuma, and Hawk Racing BB3086. The BBT-47 and BBT-47-16 are for T47 bottom brackets with different notch engagement. Always confirm your BB's interface before ordering.

What is the BBT-RS retaining system?: The Park Tool BBT-RS is an optional spring-loaded retention system that threads into the BBT-79.3's integrated threads and applies consistent pressure to keep the tool fully engaged with the BB notches during installation or removal. It is particularly useful for tight or stubborn bottom brackets.

Can I use this with a torque wrench?: Yes. The 3/8-inch drive on the BBT-79.3 is compatible with standard torque wrenches. Using a torque wrench is recommended for bottom bracket installation to hit the manufacturer's specified torque and avoid overtightening.

Best For

Mechanics installing or removing 12-notch BSA threaded bottom brackets in the 45-47mm major diameter range, including SRAM DUB BSA, Race Face Cinch, and Rotor BSA30 systems on road, gravel, and mountain bikes.

Park Tool BBT-79.3 Bottom Bracket Tool Reviews:

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