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  1. #1
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    New RB grinding noise while pedaling upright

    I just purchased a new Jamis Ventura Comp Roadbike. It is aluminum frame with a carbon fork.
    It is my first road so maybe this is normal?
    When I pedal in the forward upright position, off the saddle and my weight is shifted forward, I notice a grinding or clicking noise, seems to come from the chain.
    Is this normal?

    I am 5'10 and 200 lbs , I'm assuming my weight isn't too much for the wheel? Or the bike for that matter.
    Should it do this?

    THanks in advance!

  2. #2
    Senior Member Homebrew01's Avatar
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    Perhaps your front derailleur is very close to your chain, and when you are out of the saddle, the extra stress and flex causes chain rub.
    Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike

  3. #3
    Senior Member Ricanfred's Avatar
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    Yes; sounds like chain rub to me.
    2011 Trek 2.3

  4. #4
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    Quote Originally Posted by Homebrew01 View Post
    Perhaps your front derailleur is very close to your chain, and when you are out of the saddle, the extra stress and flex causes chain rub.
    Sounds about right. I don't know if it matters but they are Shimano Sora derailers.
    Is this a problem? I can still have the bike looked at/exchanged.
    Thanks.
    Last edited by mfpreach; 08-25-13 at 11:46 PM.

  5. #5
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    Assuming other respondent's are correct, the FD just needs to be adjusted. It is not a bike fatal problem.

  6. #6
    Senior Member Homebrew01's Avatar
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    FD rub often occurs when "cross-chaining".... that is ... being on the big chainring up front, and the large cog in back (or small-small) which causes the chain to have to bend from the inside to the outside of the bike. We usually avoid cross chaining when possible, since a different combination will likely give you just about the same gear. Also, some shifters have a "trim" option which allows you to shift the FD just enough to stop the rubbing.
    Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike

  7. #7
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    Quote Originally Posted by Homebrew01 View Post
    FD rub often occurs when "cross-chaining".... that is ... being on the big chainring up front, and the large cog in back (or small-small) which causes the chain to have to bend from the inside to the outside of the bike. We usually avoid cross chaining when possible, since a different combination will likely give you just about the same gear. Also, some shifters have a "trim" option which allows you to shift the FD just enough to stop the rubbing.
    Thanks for your response.
    I am aware that most chains will rub when one cog is the lowest and the other the highest as it has to cross. My problem just persists when putting all my weight forward. I will take it in to the LBS to see if they can adjust it.

    Thank.

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