Help I'm guessing chain rattle
08-10-22, 02:47 PM
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Help I'm guessing chain rattle
I have a slight rattle while pedaling my bike which my guess would be the chain.
It makes the noise in all gears but only when pedaling. If I switch to the large
chainring I get no noise .Any ideas?
It makes the noise in all gears but only when pedaling. If I switch to the large
chainring I get no noise .Any ideas?
08-10-22, 02:54 PM
#2
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Hold the rear wheel off the ground and turn the crank.
Use your ears.
Use your ears.
08-10-22, 02:55 PM
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I'll go along with your supposition. Especially since the chain might be a tad slacker in the small ring. Does the rattle noise lessen when in the small front and you go to the larger cog with the most teeth on the rear?
Always done this or just started after changing something... like maybe the chain.
Truthfully though, I don't expect a bike to be a stealth vehicle. Noises don't bother me much if I know what they are.
Always done this or just started after changing something... like maybe the chain.
Truthfully though, I don't expect a bike to be a stealth vehicle. Noises don't bother me much if I know what they are.
08-12-22, 07:09 AM
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Could be the small chainring is worn out from use with a worn chain. When this happens to cassette cogs, the chain often slips off/skips under pedalling loads, but chainrings have more teath engaged than the rear cogs so are less likely to skip, but will mesh badly and be noisy.
Another possibility, although doesn't explain the reason it happens in one chainring and not in the other, is that the chain is routed improperly through the rear derailleur. I made this mistake a few years ago where the chain was riding over a little tab instead of passing cleanly underneath. Take a close look at the read derailleur and see if the chain doesn't seem to be touching something that is not a moving part - it should only contact the jockey wheels.
Another possibility, although doesn't explain the reason it happens in one chainring and not in the other, is that the chain is routed improperly through the rear derailleur. I made this mistake a few years ago where the chain was riding over a little tab instead of passing cleanly underneath. Take a close look at the read derailleur and see if the chain doesn't seem to be touching something that is not a moving part - it should only contact the jockey wheels.
