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Your best guess on a mystery noise(13 posts)

Your best guess on a mystery noiseOldEdScott
Jun 9, 2003 6:36 AM
Can't run it down and it's driving me nuts. Specifics:

-- A metallic noise, somewhere between a click and a clank. A harsh sound that sounds like metal doing something to itself. Happens ever few seconds, but seems independent of what I do on the bike, i.e. it's not related to standing, turning, pedaling etc. Matter of fact, it occurs if I'm just walking the bike along. I CANNOT reproduce it in the workstand.

-- Pretty sure it's in the front end of the bike. If I had to guess from the sound and feel, I'd say headset. The headset turns smoothly, though, and if I lift the bike and turn the wheel to and fro, the noise doesn't happen. Ditto if I clamp the front brake and rock it. Everything feels fine, and no sound.

-- All the spokes feel fine, and sound nicely harmonious when I plink them.

-- The front hub IS a little rough and needs to be repacked, but when I spin the wheel on the workstand, it makes no noise.

-- I removed the quill stem and greased it just on the off chance it was stem noise. Nope.

What am I missing?
Computer sensor hitting the magnet?Dave Hickey
Jun 9, 2003 7:08 AM
How about the computer sensor hitting the magnet? It's strange that you can hear it just walking the bike. Maybe on the workstand, the front wheel doesn't have enough stress to cause it. Just a guess............
Good guess, but no. My magnet's on the rear.OldEdScott
Jun 9, 2003 7:26 AM
Are you using Open Pro Rims?Beaver
Jun 9, 2003 9:16 AM
If so, those are known to have the metal bit come loose inside the seam.

Also, did you also grease the handlebar clamp or check the bolt? I've had metallic sounds coming from a bolt that wasn't greased properly.
No Open Pros, but I've wondered about the rims.OldEdScott
Jun 9, 2003 9:26 AM
18-year-old Arayas.

As for the bolt, yeah, greased it.
Are you using Open Pro Rims?xcmntgeek
Jun 10, 2003 8:12 PM
Beaver: I have the clicking noise on my open-pro's. That sounds like the only option left beacuse I have replaced all the nipples and re-greased the bearings. How can I fix it before my riding partners kill me?
Are you using Open Pro Rims?Quack
Jun 11, 2003 10:38 AM
My best guess is that the plug used to hold the rim's shape at the rim joint has let go. The only true fix I have heard involved forcing shoe-goo into the rim at the joint to hold everything in place and prevent shifting under load that causes the click. Many have recommended lubing the nipples of the rim, but I don't believe lube is the answer to this one. According to 90% of the lube-happy fixes I have read on this board, dipping your entire bike in 10W-30 before riding would cure all of your problems. Good luck.
Cracked front axle or hub?PdxMark
Jun 9, 2003 10:51 AM
I have a friend who seems to be going through a spat of breaking them.... Probably not the correct sound, but I can't win if I don't play...
Definitely a cracked head-tube weld...Quack
Jun 9, 2003 10:53 AM
Just kidding. Have you swapped in a different front wheel?? I've had weird sounds come from presta valve stems vibrating against rims over rough pavement. But if your rims are that old, they might not be presta. I would go through the internals of the hub and repack them and work from there. As old as your wheel is, who knows? Isolate it to the wheel first. Good luck. Larry
I know this will sound wierd...pappy_d
Jun 10, 2003 8:39 AM
I had a similar noise/ problem, didn't meet all of the specifics you laid out, but it was close.
It happened on my CAAD 5, the sound seemed to come from somewhere around the headtube/down tube, and I was suspecting a cracked frame,but...

Long story short-- try lubing the rails on your saddle and reclamping it, as well as the seatpost itself. The sound of slight friction there was being transmitted through the top tube/down tube to the front of the frame- this was a few weeks ago and haven't heard the sound since.
Jun 11, 2003 11:07 AM
*things in seatbag
*headset (try tightening?)
*seatpost - sounds resonate and sometimes appear to be in other places)
is anyone out to get you?tobinb
Jun 11, 2003 9:07 PM
One time i removed a buddys handlebar and dropped a big nut down inside his stem to rattle around.
Yes we are still friends!
good oneDougSloan
Jun 12, 2003 6:34 AM
I'd have done that to Ed if he were nearby! ;-)