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Clicking noise every 1 & 3/4 turn…What to do?

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  • August 30, 2019 at 8:43 am #30065
    Huckfinn

    Hi all!

    I seem to have this annoying issue on my new bike with Ultegra RX.

    Crankset is 50/34, Cassette 36/11.

    Every time I’m on 34-27 (sometimes 34-32) I have this disturbing clicking noise exactly every turn and 3/4 of the crankset. It also happens when on 50-27 (which I don’t use often).

    Some cyclist remarqued that my tiny screws on cassette have to be adjusted (basically the external one for the larger cogs, the internal for the smaller cogs). 

    Not sure how to go about it but… Can someone help me fix it myself?

    Thanks for any feedback

    H.

    PS: the noise doesn’t come from saddle/saddle post or when I lift the bike and just turn the pedals…

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  • August 31, 2019 at 4:38 am #949163
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    CXR94Di2

    If slighty moving the

    If slighty moving the deraillrue by hand inwards or outwards removes the clicking.  Then using the barrel adjuster(where the cable enters the derailleur) turn it to move the derailleur the direction that clears the clicking/catching of chain.

    I refer you back to the Shimano instructions for guidance  SIS adjustment pages 20-22

    August 30, 2019 at 8:36 pm #949161
    0
    Huckfinn

    ok, so I did as suggested by

    ok, so I did as suggested by CXR94Di2 and fortunately it’s not the crankset.

    On the other hand I tried to push slightly the chain towards the wheel wile turning the pedals with the bike lifted from the floor, again in the 30-27 combination, and I could definetly not hear the clicking…

    Basically if the chain is closer to the wheel/tyre there is no noise.

    Does that mean the chain/derailleur has to move slightly inward?

     

    August 30, 2019 at 3:29 pm #949159
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    kil0ran

    Can’t see how it would be the

    Can’t see how it would be the BB, but check the chainring bolts are tight. It’s unlikely to be that because chainring bolt noises usually only manifest under heavy load, but worth checking. If it’s Shimano they’re accessible from the non-drive side and are either a T25 or T30 torx head.

    August 30, 2019 at 2:49 pm #949157
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    Huckfinn

    ps: it’s pressfit

    ps: it’s pressfit

    August 30, 2019 at 2:17 pm #949155
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    Huckfinn

    I can try removing the chain

    I can try removing the chain but…if it’s the BB, why would there be noise only when in 34-27 (or 50-37)?

    August 30, 2019 at 2:09 pm #949153
    0
    CXR94Di2

    Huckfinn wrote:

    Huckfinn wrote:
    ok
    actually tried now
    the noise is definetly coming from the “crankset area”
    I can feel it when turning the pedal (in reverse) and feel it on the bottom part of the frame too.
    Tried barrel adjuster with no change and the chain is perfectly “snug together”
    Every single link of it.

    If the chain has a split link take off the chain from crankset. listen to the crankset turning slowly. If it clicks its most likely its the bottom bracket (is it press fit ?)

    August 30, 2019 at 1:53 pm #949151
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    Huckfinn

    ok
    ok
    actually tried now
    the noise is definetly coming from the “crankset area”
    I can feel it when turning the pedal (in reverse) and feel it on the bottom part of the frame too.
    Tried barrel adjuster with no change and the chain is perfectly “snug together”
    Every single link of it.

    August 30, 2019 at 1:34 pm #949149
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    Huckfinn

    gosh

    gosh

    I realize how hopeless I am!!

    Tonight when home I’ll give it a go and report…

    August 30, 2019 at 1:11 pm #949147
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    kil0ran

    Hmm – loose cassette lockring

    Hmm – loose cassette lockring?

    Not familiar with how the Ultegra RX cassette splits, could it be that everything is not snugged together perfectly on the cassette and so there’s a small amount of play between the main cassette body and the big 36 & 32 rings?

    August 30, 2019 at 12:54 pm #949145
    0
    PRSboy
    Huckfinn wrote:
    ok

    …how do I do that?

     

    The derailleur adjustment?

    There should be a barrel adjuster on the back of the derailleur.  Turn it a quarter turn at a time (clockwise looking from the back of the bike to reduce tension, anticlockwise to increase tension) and see if it stops the noise.  As long as you remember how many turns you’ve made you can always put it back to how it was if it doesn’t help.

    Leave the hi-low screws alone unless you know how to set the limits up.  Chances are in this instance they won’t make any difference, and could end up putting your derailleur through the spokes which you really don’t want to do.

    Its worth watching a few videos on setting up and indexing the derailleurs, good skills to have and really not hard.

    August 30, 2019 at 12:26 pm #949143
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    vonhelmet
    TheLonelyOne wrote:
    Not knowing how your chain was put together, but… if it’s using a conecting pin, rather than a quick list, I’m wondering if that pin on the chain isn’t installed perfectly, and is protruding just enough to impinge on the adjacent cog on the cassette.

    Here’s a Park Tools video (https://youtu.be/VdUQKVMPF5I?t=449) which shows the importance of getting this pin just right.

    If it’s joined using a pin (rather than a quick-link) locate the connecting pin (it will look ever so slightly different to the rest of them) and check that it does not protrude excessively on the inside (the side facing the wheel). If it does, carefully move it outwards with a chain tool and see if that makes a difference.

    I once fitted a connecting pin myself and made a bad job of it and the chain broke when I was climbing a rather steep hill.  So yeah, you probably want to check that’s not the problem.

    August 30, 2019 at 12:14 pm #949141
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    FatAndFurious

    Not knowing how your chain

    Not knowing how your chain was put together, but… if it’s using a conecting pin, rather than a quick list, I’m wondering if that pin on the chain isn’t installed perfectly, and is protruding just enough to impinge on the adjacent cog on the cassette.

    Here’s a Park Tools video (https://youtu.be/VdUQKVMPF5I?t=449) which shows the importance of getting this pin just right.

    Locate the connecting pin (it will look ever so slightly different to the rest of them) and check that it does not protrude excessively on the inside (the side facing the wheel). If it does, carefully move it outwards with a chain tool and see if that makes a difference.

    August 30, 2019 at 11:34 am #949139
    0
    Huckfinn

    ok
    …how do I do that?
     

    ok

    …how do I do that?

     

    August 30, 2019 at 10:16 am #949137
    0
    Podc

    Check the derailleur
    Check the derailleur adjustment. I have had similar and it was the chain slightly catching the next sprocket on the cassette. Most likely needs slightly more tension on the cable.

    August 30, 2019 at 10:03 am #949135
    0
    Huckfinn

    ….bike’s brand new

    ….bike’s brand new

    <250km on it

    it’s a Canyon Grail

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