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Why do all creaks and squeeks sound as if they originate from the BB?(7 posts)

Why do all creaks and squeeks sound as if they originate from the BB?Kristin
Jun 3, 2003 7:46 AM
This time the culprit was a loose locknut on my headset--I recently replaced my fork--but still it sounded like the noise was coming from the bottom bracket. I even checked for cracks in the tubes before investigating elsewhere. Last year, my seatpost bolt had worked itself loose and it had the same effect. Just a strange observation.
My last "BB creak" was coming from the saddle clampSilverback
Jun 3, 2003 8:02 AM
I chased it for three or four days, tightening everything, adjusting the BB, even replacing the chain. Then I happened to rock side to side on the saddle when I wasn't pedaling and realized what it was...
As for WHY...probably got something to do with the Universal Perversity of Inanimate Objects.
That's where the speaker is!dzrider
Jun 3, 2003 8:15 AM
There are tiny, almost invisible, sound pickups all over your bike. They transmit through your shifter cables to a microscopic speaker, facing up, in the bottom of the down tube. I know this because all the sounds on my fixed gear bike come from the front brake which has the only cable. I silenced my other rides by stuffing the bottom bracket shell with rubber insulation and sound proofing. I'm almost done building a baffle box for the front brake on my fixie.
Did you check for mice in your BB ?MR_GRUMPY
Jun 3, 2003 8:43 AM
Usually, on a steel bike, noise doesn't "wander" all over the frame, like it does on Aluminum frames.
If there were a mouse in my BB, my rides would be easier.Kristin
Jun 3, 2003 10:44 AM
Climbing would be a breeze and I wouldn't even notice the headwinds. I don't think that's my problem, but may add some mice in the future.
Jun 3, 2003 9:04 AM
I hear a strange ticking sound sort of coming from the BB area at the end of my Belgium ride a few days ago. The next day I completely serviced my DA BB, this included taking out all the little balls and needles. On the ride afterward the sound was initially silenced only to return 30 minutes later. I then noticed that my cleats were loose. When I got back home I tightened the cranks, BB, saddle, seat post, etc., to spec just to make sure and installed the screws for my cleats with red loctite. The sound is gone now...I'm not sure what fixed it though:)
Jun 3, 2003 10:32 AM
Im sure the regulars on Components hate that subject. I've had a loose crankbolt and a lose pedal spindle create the same thing!!!