Bearing Race Stuck in TREK BB90 Frame!
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- เผยแพร่เมื่อ 5 ก.พ. 2025
- Replacing bearings can go from no sweat to sweating bullets if the inner race and ball bearings get blown out during the removal process. With painted carbon fiber all around there is no room for error when removing a stuck outer race from a Trek BB90 bike. Stop sweating. It’s easy when you know how, so here’s how…
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I love that you talk and move at 1.25 normal speed, get straight to the point, and only leave essentials in the cut.
We listen to everything at 2x speed.
killed one of my punches but saved a customer's frame today. thank you!
Get the Harbor Freight punches. They're cheap and work great.
Thanks saved me an expensive trip to the bike store. $20 dremmil at Harbor Freight and a small prybar set $7 the had had just enough of an angle then when I notched the race it came out just like in your video. Thanks so much for posting the video
Excellent, I'm so glad we were able to help you out. It really is our goal. We sell things, sure, but a lot of our videos are just educational and generic to help people out even if they don't need anything from us. It's so cool we were able to help you. Makes our day.
Great tip - worked a treat , Thank you!
Nice useful vid! I just used your Dremmel technique to cut a sharp step in the stuck ring.... Then I managed to get sufficient purchase with a sharp chisel to get it out.
Excellent, my friend. I'm so glad we were able to help you solve your problem with easy.
Thanks bro worked a treat 👍
thanks so much! worked for me on my 2021 Nukeproof Mega lower headset bearing - rusted out race was jammed in tight - this worked! cheers
Excellent, we're glad we were able to help you out.
Now thats how u show a detailed demonstration
Thanks. We try to be clear.
Brilliant! Thank you
nice job
Just subbed
Say I don't have the proper tool to use on the other side to push it out. Could I just use the dremmil tool to cut it out. & I assume I would have to be very careful to not hit the frame would a dremmil tool do the job
The cutoff wheel is round, so you have to overshoot to get at the max cutting depth. You'd have to cut into the bearing backstop (the frame) appreciably to cut completely through the race.
BBInfinite, when punching out a frame bearing from behind, where's the best place to set the punch to avoid separating the races from each other -- as close to the outside of the outer race ring as possible?
You're stuck whacking the inner race because the outer race will be obscured by the bearing backstop machined into any housing. Breaking a bearing is very rare. If it does break, and you're left with an outer race stuck in the bore, do this: th-cam.com/video/9YiezRimlHU/w-d-xo.html
How to remove the inner bearing when it stuck in the crank? Because there's not enough space to pull it out
If the inner race is stuck on the crank spindle, we recommend freezing the crank if it's aluminum. Just freeze the crank arm that has the spindle attached to it. The aluminum spindle will shrink very slightly, the steel of the race will not. Then get a piece of soft wood, like a pine 2x4, and set in on the concrete floor. Remove the crank from the freezer, quickly, take the crank arm in one hand, and use it like a hammer, driving the crank spindle down onto the wood as squarely as possible. After a few whacks the inner race should slide down the spindle enough for you to get a grip on it. If the crank has a steel spindle you're kinda out of luck and you'll just have to cut the race off at a steep angle with a cutoff wheel and a dremel.
@@BBInfinite it's ultegra. I couldn't pull out the crank because the stuck bearing is in the left side. Fortunately, I took it out with hard effort last night. Thor's hammer done it's job 😂
And the case with the stuck outer race like in the video, I pulled the outer bearing with 30 mm removal mounting block. It made work easier.
Thank you for your reply.
@@18denove By the power of Mjölnir I smite thee, ye troublesome crank set.
This is what happened to my front wheel on my bike I can see the track where the balls roll so I assume that was part of the bearing
Probably. You may be able to use this same method IF the bearings was large enough to give you room for this procedure.
you could angle the cut one way the tools' tip would sit in it better
Feel free to experiment with alternate cut-in methods and other ways to get a better bite on the race.
@@BBInfinite do you think there are advantages to a threat together bb?
@@timtaylor9590 The bearings themselves are still pressed into the shells.
@@lux-3001 yea but unfortunately they have to be smaller
wd40?
Specialized have moved back to threaded BBS.....
Yes, huge mistake no the part of Specialized. If they were going to go back to threaded they should've gone T47. English BB's are too restrictive when it comes to 30mm and DUB. Silly move by a manufacturer that tends to make good choices.
Another method: Freeze spray and a blind bearing puller on the bearing run. I had a stuck headset outer race which came through with that method. Didnt wanna risk using a dremel!
Freezing will not work because the race is steel. You'll never get it cold enough, long enough, to shrink it with spray. If it was aluminum, sure, that'd work. Running a Dremel isn't risky as long as you're careful.
@@BBInfinite well, it worked for me, although it wasn't a BB.
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