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Park Tool BBT-9 Bottom Bracket & Rotor Lockring Tool
Bicycle bottom brackets occasionally require removal for service, replacement, or upgrading. The Park Tool BBT-9 is used to remove and install 16-notch threaded external bearing bottom brackets with a 44mm outer diameter, including:
- Shimano BB80, BB5700, XT BB70, BB51, and previous external bearing threaded cups
- Campagnolo
- SRAM/Truvativ GXP
- Chris King
- FSA MegaExo
- Hope
- Race Face X-type
- Surly
- Wheels Manufacturing
- Fulcrum
The BBT-69.2 also fits common 16-notch disc brake rotor lockrings.
Additionally, the BBT-9 includes a tool that removes and installation of 8-point Shimano Hollowtech II crank arm adjusting caps. The long, plated-steel handle offers good leverage for high-torque applications and is vinyl-dipped for comfort. Manufactured by Park Tool, the most trusted name in bicycle tools and repair equipment for over 50 years.
Count Splines/Notches
Remove the crank and inspect the bottom bracket shell for tool fittings, which can be notches or indentations on the outer perimeter, splines on the inside perimeter, or pin holes on the face. Count the number of tool fittings on the cup.
Measure Diameter
Next use a caliper to measure the diameter or width of the tool fittings. For external notches, simply measure the outer diameter of the bottom bracket cup or adapter. Take the measurement in millimeters.
Select Tool
The BBT-9 is for 16-notch, 44mm tool fittings. Here are some tools we offer for this and a few similar tool fittings:
TRUSTED SINCE 1963
Since our origins in the back of a bike shop in 1963, it has been Park Tool's sole mission to design and manufacture high-quality tools that empower mechanics and riders of all skill levels to service their bicycles. Just like our other 500+ tools, our bottom bracket tools are a product of our decades of experience and expertise in the industry, in the shop and on the trail.
Customer
Reviewed in the United States on February 19, 2025
No issues. Quality.
Kingofkent
Reviewed in the United Kingdom on February 18, 2025
Ultra reliable Park Tools - does exactly what it should, would highly recommend
Gary ThomsonBEAMISH
Reviewed in the United States on April 9, 2025
True to quality
D-Mano
Reviewed in Belgium on August 20, 2024
Honnêtement on peut trouver un outil pour bien moins cher, mais après avoir tenté 2 outils différents qui n'ont pas permis de serrer correctement la roue soit à cause d'un plastique mal placé, soit à cause d'une prise en main ultra mauvaise, ce park tool a résolu tous mes soucis.Donc oui la qualité à un prix
B
Reviewed in the United States on August 12, 2024
I was first sent an empty park tool BBT-9 bag inside a sealed Amazon mailer, whoever it was corrected the issue immediately and sent a new one before I even sent the packaging back for the return.It is a nice heavy duty quality tool like park tool always seems to make!
S wilkinson
Reviewed in the United States on March 9, 2024
Tool works great, and is very sturdy.
Kara Dobie
Reviewed in the United States on January 9, 2024
works great.
Felix
Reviewed in Germany on August 13, 2023
Beim Wechseln der Bremsscheibe war der Ring so fest, dass ich immer abgerutscht bin, da auch das billige Werkzeug mit den Versuchen verschlissen ist. Nicht das das von parktool, sitzt perfekt und mit einem Rohr als Hebel absolut kein Problem zu öffnen! Amazon hat mich gerettet 😁
David
Reviewed in Spain on May 31, 2021
Busque muchas opciones antes de llegar a esta marca y después de apostar por este producto Estoy encantadisimo con el, tiene muy buenos acabados y La ergonómica es muy buena para hacer fuerza y aflojar las roscas.
Atom
Reviewed in the United States on August 12, 2019
If you need it, this is the one. As others have said this one locks on the best and won't slip and scratch anything. I definately found this to be true and can see why this one is better than the others. Wasn't sure about the necessity of the black nut wrench being dirently attached to the end of the handle but yes, it is very nice and beneficial. Two tools in one. Handle is pretty solid and lock up on the BB is probably the best. It got the job done and I was happy I paid a little more to get this one.
MrMoose
Reviewed in the United States on May 7, 2018
I have NO IDEA of why I have read so many reviews online about this tool not working. I just took off my SRAM bottom bracket with external bearings, and internal threads, on my touring bike and the metal end of it fit perfectly, did not come loose or jump off the bottom bracket, and allowed me to crank on it to break it loose. It was the original on the bike put on there 9 years ago.The smaller shaped Hollowtech II bottom bracket that I bought came with a little plastic adapter, that fit perfectly into this tool, ( inserted and used so that the "collar" of it faced the bike, to fit better, and allowed the collar to act as a protector against the whole bottom bracket finish. NOTE: that plastic piece only slid in enough to be even and flush with the other side of the tool, but was not a problem at all ) and did not slip, slide, strip, or come flying off as I was torquing down (by feel). I read people having this happen to them and I just, don't, get it. Mine worked perfectly.THEN there is the other plastic end. People talk about how they can't loosen their crank arm "adjusting cap". (they call it dust cap, and even pre-load cap or bolt, but that ain't what it is, maybe they are talking about a way different crank??) I put my tool on my adjusting cap of my Hollowtech II 2 piece crank set non-drive side arm, and turned it hand/finger tight, just to take out any space between the back of the crank arm and face of the bottom bracket. According to specs, this is only suppose to be torqued to 0.7-1.5 N-m!!! (6-13 in. lbs.) Huh? Mine was easy! To take it off, this will be very simple too. Are people NOT loosening the crank arm pinch bolts first before trying to loosen the adjusting cap? The exact opposite of installation? I don't know. What I do know is that I am not buying some long armed tool, or that metal tool with big wings on it to crank the crap out of that small adjusting cap. I mounted my crank arm, checked for looseness, had none, hit the arm with my hand a few times and was getting 3 turns out of it without the weight of the pedals even being on there. COOL TOOL!
kang
Reviewed in the United States on January 28, 2018
Great tool, though over the years I noticed it is too big to fit certain frames and you have to crank at an angle, which makes it likely to strip the bb's grooves. Its because they use cheaper metal (which makes this tool relatively cheap so not actually a bad idea) and thus oversized it.For example, RWC GXP BB + SantaCruz higher tower => you have to remove the rear triangle of the frame for the non-drive side to fit, or crank at an angle to 50Nm (which is pretty much a guarantee of striping some of the bb grooves)
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