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Noise(15 posts)

NoiseFatManLittleBike
Aug 20, 2003 7:17 PM
I've got a noise coming from somewhere on my bike that I can't find. It sounds like someone is strumming my spokes. It only occurs when I'm pedalling with moderate or firm pressure. It does not occur when I'm not pedalling or I'm pedalling lightly. I figured it was my bottom bracket so I replaced it. It's still strumming. Any ideas?
re: Noisespankdoggie
Aug 20, 2003 7:23 PM
Maybe you are just a fat man. Nothing is wrong with your bike. I suggest you lose some weight, to be respectfully honest...
Makes a lot of sense, except ...FatManLittleBike
Aug 20, 2003 7:34 PM
... it doesn't make noise while my fat ass is coasting ... sooooo ... I'm looking for some advice that might lack some of your "respect" but provide some useful information. Go back to spank'n your doggie.
Makes a lot of sense, except ...spankdoggie
Aug 20, 2003 7:37 PM
Did you get the rear wheel trued? I think you have loose spokes. I have hand built wheels from scratch, so I think you have a loose or broken spoke?

What do you think?
Re: What do I think?FatManLittleBike
Aug 20, 2003 7:41 PM
The rear wheel is true. No loose spokes. No broken spokes.
Re: What do I think?spankdoggie
Aug 20, 2003 7:43 PM
Do you have an aluminum frame?
Maybe the frame is cracked?
Re: What do I think?spankdoggie
Aug 20, 2003 7:46 PM
You know what I really think? You should take your bike in for a tuneup. Tell the pros what you feel and hear. They will tune it up, and hopefully your problem will be solved.

I have paid about $100 for a nice, general tuneup for my bike, and if your bike is worth half a rat's ass, you should probably consider getting a tuneup, even if it is only a $40 oil job, so to speak.

I wish you well, you fat bastard.
Re: What do I think?FatManLittleBike
Aug 20, 2003 7:48 PM
No. Maybe.
Find out what is isn't.Spoiler
Aug 20, 2003 9:09 PM
"I've got a noise coming from somewhere on my bike that I can't find. It sounds like someone is strumming my spokes. It only occurs when I'm pedaling with moderate or firm pressure. It does not occur when I'm not pedalling or I'm pedalling lightly. I figured it was my bottom bracket so I replaced it. It's still strumming. Any ideas?"

Try to narrow the possibilities down further. Try all of these ONE AT A TIME.

1. See whether it makes any difference what gear you're in, big ring, little ring? Could it be the big ring hitting the outer plate of the derailleur cage? Sometimes if the bike's frame is flexy, the bottom bracket area can flex when you press hard on the pedals, especially if it gets louder when you press on the right pedal.

2. Do you have any spare front or rear wheels you can borrow? Put it on and see if the noise is still there.

3. Remove your pedals, clean the threads and the female threads on the cranks, and reinstall them.

4. Saddles and seatposts flex only when your pedaling. If the noise disappears when you pedal out of the saddle, this could be the trouble.

Noises like this are tough to find. A bike frame can act like a musical triangle, noises originating from one spot can resonate along the tubes and come out somewhere else.
Thank you very much! nmFatManLittleBike
Aug 21, 2003 3:20 AM
Also try this....zero85ZEN
Aug 21, 2003 5:47 AM
Make sure your quick releases are tight. I know it seems silly, but I've quieted "mystery noises" on two of my bikes, that I was convinced were originating from the BB, by tightening the quick release levers. Front wheel on one bike, rear wheel on the other. Commonality between them was that the wheels both had sealed bearings that are pressed into the hub body when you thighten the skewers.
It's a simple thing but sometimes the simple works.
A noisy bike drives me nuts if I don't know where the noise is coming from!
Disagree with your #4pitt83
Aug 21, 2003 5:54 AM
Even while coasting, the seat and seat post can make noises and flex. If it's not greased (Al) or cleaned (CF), you can get noises from road bumps while coasting. Not to say pedaling wouldn't give more noise; likely true.
Another cause...KEN2
Aug 21, 2003 9:14 AM
I was plagued with a similar problem on my bike, turned out that the drive side spokes on the rear wheel were rubbing each other under power, i.e. stronger pedal strokes. I tried lube between them but that didn't help, then saw an article from Uncle Al on the RoadBikeRider site about poor man's tying and soldering: you use the smallest zipties around the spoke crossing, zipped up tightly. Cured the problem, no more noises. Since I have black spokes the black zipties are unobtrusive.
re: Noiseemckee
Aug 21, 2003 10:37 AM
Another thought:

Often times when I'm pedalling moderately to hard, I hear a "thrumming" noise from my chain and cassette. I've always taken it to be a normal noise, but perhaps are you hearing the same type of thing?

-erik
re: NoiseRich_Racer
Aug 21, 2003 2:37 PM
Could just be your saddle. Does it go away when you stand up??