mystery sound
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Thread: mystery sound

  1. #1
    RoadBikeReview Member
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    mystery sound

    On a recent ride, I would hear an extremely loud clunk as another rider passed, as she changed into a higher gear I assume. I'm wondering what that might be. This wasn't a click, clack, chatter. It was a solid metallic clunk, and loud as hell, during a gear change. It's not my bike, but out of curiosity I'd like to know if anyone knows what that could be.

  2. #2
    'brifter' is a lame word.
    Reputation: cxwrench's Avatar
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    Upshifting.
    I work for some bike racers
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  3. #3
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    the sound it makes when you drop someone?

  4. #4
    'brifter' is a lame word.
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    Quote Originally Posted by J.R. View Post
    the sound it makes when you drop someone?
    Thanks for adding reputation to this user.
    I work for some bike racers
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  5. #5
    Russian Troll Farmer
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    We need to know more about this sound. Can you please try to describe it better? Was it more of a "clackity-clackityclack", or a "whhonka-whonka wohnka"? Perhaps a "wook-wook-wook? We need to know!!!!
    "L'enfer, c'est les autres"

  6. #6
    'brifter' is a lame word.
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    Seriously...if the derailleur cable tension is adjusted a bit on the 'loose' side the chain will slam down to the next smaller cog pretty hard. Lots of times this is more noticeable on SRAM derailleurs as the spring is a little stronger than Shimano. The SRAM Red powerdome cassettes were notorious for being noisy as well. Sometimes carbon rims will add to the noise. I find that it happens more on the smaller cogs too, the chain can just really slam down to them. More pressure on the pedals makes for more noise too.
    I work for some bike racers
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  7. #7
    Adorable Furry Hombre
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    Quote Originally Posted by cxwrench View Post
    Seriously...if the derailleur cable tension is adjusted a bit on the 'loose' side the chain will slam down to the next smaller cog pretty hard. Lots of times this is more noticeable on SRAM derailleurs as the spring is a little stronger than Shimano. The SRAM Red powerdome cassettes were notorious for being noisy as well. Sometimes carbon rims will add to the noise. I find that it happens more on the smaller cogs too, the chain can just really slam down to them. More pressure on the pedals makes for more noise too.
    Another possibility....I have a Bitex hub wheelset, every-once-in-a-while a pawl won't quite seat...result an unpredictable one-offmetallic BAAAAAM! when pedaling, even spinning and not mashing, every few miles. Only happens with that wheelset, even swapping around cassettes.
    "Refreshingly Unconcerned With The Vulgar Exigencies Of Veracity "

  8. #8
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    Wait, what, you got dropped by a chick?
    I assume that was the sound of your manhood dying

  9. #9
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    This seems most plausible.
    Quote Originally Posted by cxwrench View Post
    Seriously...if the derailleur cable tension is adjusted a bit on the 'loose' side the chain will slam down to the next smaller cog pretty hard. Lots of times this is more noticeable on SRAM derailleurs as the spring is a little stronger than Shimano. The SRAM Red powerdome cassettes were notorious for being noisy as well. Sometimes carbon rims will add to the noise. I find that it happens more on the smaller cogs too, the chain can just really slam down to them. More pressure on the pedals makes for more noise too.

  10. #10
    Neophyte
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    My wife's cadenced is super-erratic and she doesn't ride much, but she also has strong legs... many times when she "drops the hammer" it's when she's spinning and the freewheel or whatever is not fully engaged so there is a "thunk" sound right as she starts to pedal hard. Maybe it's something like this. The sound drives me nuts although I'm ecstatic anytime I can get her out with me.

    Also front derailleurs thunk loud sometimes although that's on downshift...

  11. #11
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    If someone I passed 'clunky's' into the big chainring, I'm may get worried, but only a little!
    BANNED

  12. #12
    Los Barriles, BCS, Mexico
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    Often a carbon frame will amplify sounds much like a guitar body.
    Trying to cram the rest of my life into the rest of my life!

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