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Park ToolBBT-79 Bottom Bracket Tool


Item # PAR004O

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  • Silver, 46mm ($28.95)
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Item # PAR004O

BBT-79 Bottom Bracket Tool

Threaded bottom bracket installation and removal is a breeze with the Park Tool BBT-79 Bottom Bracket Tool. The cup is easy to place on a 12-notched external bearing bottom bracket, and uses a 3/8-inch drive for attachment to a ratchet or torque wrench so you can torque down your bottom bracket just right. The BBT-79 fits 46mm bottom brackets, and is anodized silver so its easy to spot it in your drawer of bottom bracket tools.

  • A bottom bracket tool for external BBs
  • 46mm diameter with 12 notch OD cup
  • Works for a large assortment of external bottom brackets

Tech Specs
Compatibility12-notch external bearing bottom brackets, including Race Face Cinch, Rotor BSA30, Zipp Vuma, Hawk Racing, BB3086, SRAM DUB
Recommended Usebike maintenance
Manufacturer Warrantylimited lifetime

What do you think about this product?


>Rating: 5

THE tool for Shimano rotor lockrings.

I've put it through the wringer

When you're running through-axles you often have to take the end caps off to properly torque your rotor lockrings, this is the tool that lets you torque 'em down properly and still get the end cap back on.

>Rating: 3

Good enough for the job

I've used it several times

A bottom bracket gets installed once, and serviced once or twice a year. The Park Tool BBT-79 works well. Fits well on the parts and has a 3/8" drive for a torque wrench.

>Rating: 2

Material seems to be too soft for use

I've used it once or twice and have initial impressions

First off, why are there so many specific and proprietary bike parts? Why does one BB need to have a unique number of notches to differentiate it from another one? Aside from that, I only used this tool once to swap a BB from one bike to another. After one use, the part's metal had bent and was completely stuck on the 3/8

>Rating: 3

slips off super easily

I've used it several times

Not sure if it is the fault of raceface's BB design, or this tool, but man this thing is a pain to use. As soon as you apply torque the tool starts slipping off the bottom bracket. Very hard to use with your bike in a stand or upside down. Best way is to lie bike on its side so you can get downward force so the tool doesn't slip off. Gets the job done, but very poor design.

Have you tried this inn comparison to Race Faces BB30 Tool? If so - which is better option?