This video walks through the complete procedure of removal and installation of bottom brackets used in threaded shells, including three-piece cranks, threaded “thru-spindle” external bearing cups, and bottom brackets used in T47 shells.
Questions or comments? Leave them below!
See all our bottom bracket videos in our Bottom Brackets playlist
▶︎ https://www.youtube.com/playlist?list=PLGCTGpvdT04S-dkxjU7HJjboDnTJNmjp-
Video contents:
00:00 Preliminary Info
01:36 Removal
03:56 Installation – Thread Preparation
05:19 Installation – Threaded Thru-Spindle
06:09 Installation – Cartridge-Style
➤ Related Text Articles:
• Bottom Bracket Standards and Terminology – https://www.parktool.com/blog/repair-help/bottom-bracket-standards-and-terminology
• Bottom Bracket Tool Selection: Threaded and Thread-Together – https://www.parktool.com/blog/repair-help/bottom-bracket-tool-selection-threaded-and-thread-together
➤ Tools & materials used:
• Appropriate bottom bracket tool – https://www.parktool.com/category/crank-bottom-bracket
• SWR-8 3/8” Drive Ratchet Handle – https://www.parktool.com/product/3-8-drive-ratchet-handle-swr-8
• SWB-15 3/8″ Drive Breaker Bar – https://www.parktool.com/product/3-8-drive-breaker-bar-swb-15
• PPL-1 PolyLube 1000™ Lubricant – https://www.parktool.com/product/polylube-1000-lubricant-tube-ppl-1
• ASC-1 Anti-Seize Compound – https://www.parktool.com/product/anti-seize-compound-asc-1
• TLR-1 Medium Strength Threadlocker – https://www.parktool.com/product/medium-strength-threadlocker-tlr-1
• TW-6.2 Ratcheting Click-Type Torque Wrench – https://www.parktool.com/product/ratcheting-click-type-torque-wrench-tw-6-2
For a text-based walk-through of this process: https://www.parktool.com/blog/repair-help/bottom-bracket-removal-installation-threaded
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➤ More Bottom Bracket Repair Help:
• What Type of Bottom Bracket Do I Have? ▶︎ https://youtu.be/e-8G1G9QNX8
• How to Remove and Install Bottom Brackets – Press Fit ▶︎ https://youtu.be/2VnwKrC9rS0
• How to Remove and Install Bottom Brackets – Thread-Together ▶︎ https://youtu.be/84Ut53i17iQ
• How to Remove and Install Bottom Brackets – Cup & Cone ▶︎ https://youtu.be/sEv8irsdQI8
• Crank & Bearing Removal and Installation – Campagnolo® Ultra-Torque™ ▶︎ https://youtu.be/YDk9sp5xRkA
• One Piece Crank & Bottom Bracket Removal and Installation ▶︎ https://youtu.be/dpl_wlTBC8k
➤ Fix It:
Did you know that Park Tool is the #1 resource for bicycle repair education?
• Visit our YouTube Channel: https://www.youtube.com/parktool
• Visit the Repair Help section of Parktool.com: https://www.parktool.com/repairhelp
• Check out The Big Blue Book of Bicycle Repair: https://www.parktool.com/product/big-blue-book-of-bicycle-repair-4th-edition-bbb-4
➤ About Park Tool:
Since our founding in 1963, Park Tool has been the leading name in bicycle tools. Our YouTube channel is an extension of our mission to be the ultimate resource for mechanics and riders of all skill levels. Here you will find comprehensive repair help tutorials for a wide range of components and processes, as well as troubleshooting guides, tips and tricks, and information on the latest Park Tool products.
I can service my bike myself thanks to your videos.
Ya'll always put too much on a very simple job, and it's RIDICULOUS!!!
This isn't difficult until these 🤡 s get a hold of ANYTHING on a bike. 🤮
HI CALVIN KINDLY LET ME KNOW FOR BSA 2241 16T WHICH TOOL IS COMPATIBLE PLEASE
How do I know spindle length? I measure 124.5mm on my trek roscoe 6, but that seems strangely big right?
Video at about 7:28 shows apparently applying full torque to the lock ring on the left (non-drive) side (BSA cartridge type). Can this be correct? My spindle binds with too much torque. Shouldn’t the left side only be tight enough to keep the bearings happy, with a little pre-load?
6:33 Technical question, I have a Dutch style bike with a fully enclosed chain-case/guard. The metal mount for the backside of the guard is clamped behind the sealed cartridge BB flange, can I remove it without adding a spacer in its place?
Watched this three times today and I STILL forgot which direction to go when I got started
⭐️⭐️⭐️⭐️⭐️
Thank you so much for this information. You have shown me that I should just buy a cheap new or a used bike instead of trying to repair the bottom bracket.
Chris King T47 has a 50 nm spec for tightening and a shallow tool engagement. No matter how hard I tried, I couldn't keep the tool on there to apply enough force to remove it. I may have to resort to vice grips. I don't know what else to do.