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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 01-28-11, 12:11 AM   #1
fixedgear80
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"Chain noise" only over bumps

Really sorry if this has been asked already....I'm sure it has LOL.

Well I just put my new bike together about 3 days ago (40 miles) and Shes a very smooth girl (Reynolds 531). At speed all I can hear is tires on the road! Until I hit a minor bump. The chain will rattle/shake. Its kind of unsettling, my chain only has about .75" of wiggle room.
I didn't hear this on my old beater (Alum Frame) Could it be the Steel flexing? Or do I just need to take a link out of my chain? Running 48X16 rear axle is in the back of the dropouts. Will be upgrading to a 18t once I sell my old frame set.
p.s. Lets not start the chain tension wars over this
Thanks.
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Old 01-28-11, 12:16 AM   #2
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There are lots of possibilities. Are you sure it's the chain? Check this out: http://sheldonbrown.com/creaks.html

Unless your frame is cracked, I really doubt it's to blame.
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Old 01-28-11, 12:18 AM   #3
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No don't take a link out, it's normal. I get it all the time when I go over something bumpy, it's just the chain bouncing.
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Old 01-28-11, 12:35 AM   #4
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Thanks Vixtor as you can see that chain isn't very slack at all. I don't hear any other noises except for that. I MASHED her over Burnside Bridge out of saddle NO BUMPS=No Noises. I just think its the chain, I'm not worried about it hopping off or anything. No cracks on her trust me gave her the once over about 30 times, in the past 4 months shes been in my living room.
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Old 01-28-11, 05:59 PM   #5
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Do you have a freewheel on the other side? Those can be noisy if there is no chain attached to them, especially over said bumps.
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Old 01-28-11, 06:02 PM   #6
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I had this problem when my chain tension was too low. Also try taking both rims off and re setting them. My front rim was making a werid noise that sounded like a chain boucning. now its gone.
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Old 01-28-11, 07:00 PM   #7
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This problem only occurs with blue chains.
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Old 01-28-11, 07:03 PM   #8
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This problem only occurs with blue chains.
lol
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Old 01-28-11, 07:12 PM   #9
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Maybe its the freewheel? I have looked down while listening and I can see it jumping slightly.
I hope a new (silver) chain or tension, will help. And yes the freewheel needs to come off. Thanks
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Old 01-28-11, 07:33 PM   #10
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ah. probably is.

i have experienced something similar with rattles, and taking off the freewheel from the flip/flop fixed it.
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Old 01-28-11, 08:29 PM   #11
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creaks and clicks can come from anywhere. Just last spring I was working on a bike for a friend, his BB was making some noise so i thought a good examination and regrease was in order. When i got the cups off, two acorns fell out and landed in my tub of grease. My best guess is that it was stored outside without a seatpost in the fall when the squirrels would have been storing nuts for the winter.

Just saying don't put all your effort into one spot or problem, might not be your chain.
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Old 01-28-11, 09:04 PM   #12
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Honestly the frame has been given the once over a few times. I did a lot of work by hand sanding lugs and sanding the paint off All By Hand the frame is not the problem.
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