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Thread: Dura Ace chain noise

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    Default Dura Ace chain noise

    Your thoughts and advice, please.

    When the chain is on the larger ring and on the third to the sixth sprocket, pedalling creates a noticeable sound, like a large fan going full on.

    It is silent when on smaller or larger sprockets. When in the smaller ring, it is silent regardless of sprocket position.

    I think the source of the noise is the rear derailleur, perhaps the upper pulley, but I cannot be certain despite few attempts on the workstand.

    The groupset is DA R9100 series Di2 with a new DA chain (the chain has maybe 300km on it to date and was completely degreased first and then NFS-lubed as usual). The system shifts perfectly.

    The noise per se doesn't really bother me. However, it probably indicates increased friction somewhere, which does bother me, especially since the gear range in question is the one I use most of the time.

    Thanks for considering the above.
    Chikashi Miyamoto

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    Default Re: Dura Ace chain noise

    just one thing to check - but triple check the quick link. the new shimano chain quick links take a lot more force to set than any other i've experienced.

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    Default Re: Dura Ace chain noise

    Is the cassette worn? These are the middle sprockets that usually get the most usage. If they are worn cogs with a new chain I'd say you have your answer.
    La Cheeserie!

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    Default Re: Dura Ace chain noise

    Quote Originally Posted by AngryScientist View Post
    just one thing to check - but triple check the quick link. the new shimano chain quick links take a lot more force to set than any other i've experienced.
    The quick link is good. Thanks.
    Chikashi Miyamoto

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    Default Re: Dura Ace chain noise

    Quote Originally Posted by Saab2000 View Post
    Is the cassette worn? These are the middle sprockets that usually get the most usage. If they are worn cogs with a new chain I'd say you have your answer.
    Sorry, I forgot to mention that I think the noise was there with the old chain too.

    The cassette has seen about 3400km and does not look worn. Also, in terms of wear, it's not exhibiting what I have seen as typical symptom: chain skipping under effort.

    Thanks.
    Chikashi Miyamoto

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    Default Re: Dura Ace chain noise

    B-tension screw?
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    Default Re: Dura Ace chain noise

    Is the wheel in straight, QR or thru axle? Is wheel true? Then remove rear derailleur check alignment with HAG/DAG tool. Speaking from experience always check the obvious, never assume. Shimano says to tune by sound so after all that check limit screws and try a Di2 tune. Lets us know what works.
     

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    Default Re: Dura Ace chain noise

    I turn off my hearing aides.

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    Default Re: Dura Ace chain noise

    Quote Originally Posted by Too Tall View Post
    I turn off my hearing aides.
    It actually sounds kinda cool, like one of those floating transports in Star Wars (whatever they're called). :)
    Chikashi Miyamoto

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    Default Re: Dura Ace chain noise

    Quote Originally Posted by j44ke View Post
    B-tension screw?
    I was thinking about that... Will have a tinker. Thanks.
    Chikashi Miyamoto

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    Default Re: Dura Ace chain noise

    Quote Originally Posted by DBordewisch View Post
    Is the wheel in straight, QR or thru axle? Is wheel true? Then remove rear derailleur check alignment with HAG/DAG tool. Speaking from experience always check the obvious, never assume. Shimano says to tune by sound so after all that check limit screws and try a Di2 tune. Lets us know what works.
    The wheel is true and in straight (QR). There is no reason for the rear triangle to have gone out of alignment, but worth checking. Thanks.
    Chikashi Miyamoto

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    Default Re: Dura Ace chain noise

    It's a long thread but have a look at this treatise on chain length for 9100 drivetrains over at the W Weenies forum: Optimal Chainlength - It's A New Day - Weight Weenies
     

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    Default Re: Dura Ace chain noise

    i recently experienced this, as well, following a new chain. thought it was worn pulleys, so i didn't pay any attention, really. then i put on one of those CeramicSpeed OSP deals....the sound remained. Aluminum frame, carbon clinchers....to me it sounded like it was coming from the chainrings (9100 crankset with Rotor rings), which have seen a large number of miles. But there was no indication that they were excessively worn, nor did I have another crank to roll with.

    my conclusion was that it was the combination of a new chain + old rings. i made the customer aware, and he has yet to mention anything to me. i've asked multiple times.

    that optimal chainlength post looks like something i would've typed up following my first installation of a chain on the new RDs.
    -Dustin

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    Default Re: Dura Ace chain noise

    Quote Originally Posted by bdaghisallo View Post
    It's a long thread but have a look at this treatise on chain length for 9100 drivetrains over at the W Weenies forum: Optimal Chainlength - It's A New Day - Weight Weenies
    Good spot.

    There's something about the Shadow RD that breaks the convention. The original chain was cut and installed based on the traditional method.

    When the bike was first completed, I was mucking about just to get myself acquainted with how Di2 works and found that the chain was too short for large chain ring to largest sprocket combo. Therefore, the chain was replaced, with 2 additional links, which worked as it should. The replacement chain was cut to the same number of links.

    Thanks.
    Chikashi Miyamoto

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    Default Re: Dura Ace chain noise

    Quote Originally Posted by j44ke View Post
    B-tension screw?
    I loosened it a bit to make it closer to the upper pulley. The sound decreased somewhat but not entirely. No change in shifting efficiency, however.

    Quote Originally Posted by DBordewisch View Post
    Is the wheel in straight, QR or thru axle? Is wheel true? Then remove rear derailleur check alignment with HAG/DAG tool. Speaking from experience always check the obvious, never assume. Shimano says to tune by sound so after all that check limit screws and try a Di2 tune. Lets us know what works.
    I don't have a fancy tool for frame alignment, but the frame passed with flying colours based on the string test.

    I re-did the Di2 RD alignment procedure with no effect...

    Thanks, both.
    Chikashi Miyamoto

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    Default Re: Dura Ace chain noise

    Mine is a stainless steel frame. The rims are carbon (tubular), but they are from Corima, with foam filling which, amongst other characteristics, minimises the audio resonance.

    As you say, it may just be a new-chain-thing although I think it was there with the old chain, which I chucked after 3000 km.

    On the plus side, it does side like I'm going a million miles an hour!
    Chikashi Miyamoto

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    Default Re: Dura Ace chain noise

    I found that on R8000 at least I had to run the B screw farther in than expected and the gap between upper pulley and largest cog was more than expected as a result. Shifted very smoothly nonetheless.
     

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    Default Re: Dura Ace chain noise

    Dura-Ace cassette? They are noisier than an Ultegra cassette.
     

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    Default Re: Dura Ace chain noise

    Quote Originally Posted by j44ke View Post
    I found that on R8000 at least I had to run the B screw farther in than expected and the gap between upper pulley and largest cog was more than expected as a result. Shifted very smoothly nonetheless.
    Initially I had it set further apart like you. I felt that shifting was smoother that way. At least, at the time I thought so...
    Chikashi Miyamoto

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    Default Re: Dura Ace chain noise

    Quote Originally Posted by boots2000 View Post
    Dura-Ace cassette? They are noisier than an Ultegra cassette.
    Yep, DA. Interesting observation. Thanks.
    Chikashi Miyamoto

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