The job
A 3/8-inch-drive aluminum socket with integrated threads for the separately sold BBT-RS.
Park Tool · Bottom-bracket cup tool
Park Tool BBT-79.3 Bottom Bracket Socket
A 3/8-inch-drive aluminum socket with integrated threads for the separately sold BBT-RS.
$30.95Nov 7, 26, 12:53 AM · New York
Add to cart Price info
This is a monthly price snapshot supplied by Rainforest, not a live quote. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Opens this product on Amazon. Check the selected offer, contents and current price there.
- Cup contact 12 notches; 45–47 mm major / 44 mm minor diameter
- Square drive 3/8 in
- Body CNC-machined, anodized aluminum
Cup contact
12 notches; 45–47 mm major / 44 mm minor diameter
Verify the particular cup
DUB describes a wider component family. Confirm the actual 12-notch cup and fitting dimensions.
What this choice changes
Twelve-notch cups and an optional retention connection
The BBT-79.3 serves matching 12-notch cups, including the specific SRAM BSA DUB, Race Face Cinch and Rotor BSA30 applications named by Park Tool. Its contact has a 45–47 mm major diameter and 44 mm minor diameter. These dimensions and the notch pattern give you a more useful selection check than DUB or a brand name by itself.
The CNC-machined, anodized aluminum body uses a 3/8-inch square drive. Supply a suitable manual driving tool; the socket does not include a ratchet or measure torque independently. Integrated threads provide a connection for the optional BBT-RS retaining system, which is a separate accessory rather than a supplied part of the socket.
Choose this model for its actual cup fitting and retention provision. The BBT-19.2 is not a substitute on the strength of its similar appearance: that model engages a 16-notch fitting. Park Tool excludes impact drivers and other power tools for the BBT-79.3.
Specifications & supplied details
| Detail | Specification |
|---|---|
| Cup contact | 12 notches; 45–47 mm major / 44 mm minor diameter |
| Square drive | 3/8 in |
| Body | CNC-machined, anodized aluminum |
| Retention provision | Integrated threads for BBT-RS, sold separately |
| Named examples | SRAM BSA DUB, Race Face Cinch, Rotor BSA30, Zipp Vuma, Hawk Racing BB3086 |
| Supplied | One socket; driving tool and retention system separate |
Choose for your actual setup
Verify the particular cup
DUB describes a wider component family. Confirm the actual 12-notch cup and fitting dimensions.
Plan retention separately
The integrated threads are a connection feature. Buy the BBT-RS only if its configuration is appropriate to your job.
Fit checks & limits
- No impact-driver or other power-tool use.
- Do not generalize compatibility to every DUB or T47-labelled bottom bracket.
Questions before you choose
Does it include the BBT-RS?
No. It has the socket-side retention threads; the retaining system is a separate purchase.
Can I drive it with my 3/8-inch torque wrench?
The square-drive size matches that format. Use a suitable manual wrench and the exact component procedure; the socket supplies no torque setting.
Is this another size of the BBT-19.2 fitting?
The engagement pattern is different: 12 notches here versus 16 on the BBT-19.2. Choose by the complete contact geometry.
Guides for this choice
Buying guide ↗
Match the Component Contact Before the Drive Handle
Separate the surface that touches the bicycle from the interface that accepts your wrench, then check access and any required retaining accessory.
Buying guide ↗Choose Crank Pullers, Cap Tools and Bottom-Bracket Contacts
Separate arm extraction, cap adjustment, cup engagement and counterholding to buy the contacts your actual drivetrain needs.
Other equipment to consider
Selected listing details, manufacturer information and source images were compared. No hands-on trial or universal fit is claimed. Product identifier: B09VYB1PWQ.