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Annoying rattle, can anyone help?

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    #32
    lismore7
    Registered Users Posts: 259 ✭✭lismore7


    After much research, help from boardsies and joint help from my daughter with good hearing....rattle has now been identified but NOT rectified.

    It is indeed a design issue regarding the rear brake cable which runs inside the top frame.
    There seems to be some internal device connected to this cable inside the frame, that over time begins to vibrate louder against the carbon frame, over rough roads.
    Due to the nature of this fault, it will be covered under warranty.
    After speaking with my LBS, it seems this can be a problem with other makes of bikes that have the cables running internally.
    My LBS have dealt with this issue before and will sort it for me.

    Anyone else had this issue?


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    #33
    ashleey
    Registered Users Posts: 2,005 ✭✭✭ashleey


    Just a suggestion seeing as you say that it's noticeable when you hold the drops:

    You will slightly stress the steerer in the headset. This will lift the compression ring slightly that holds down the top headset cartridge bearing. The bearing then rattles in the frame due to the minuscule gap.

    It is solved by ensuring that the headset cover (the lower most spacer under stem on top of frame) sits slightly above the frame before preloading the bearings when tightening the top cap. This requires micro spacers or shims inside the headset cover. They are basically 1 1/8 inch washers about 0.25mm or 0.6mm thick.

    Then, when you tighten down the top cap, before the stem bolts the spacers and cover squeeze down on the headset bearing to hold it down neatly. The compression ring sort of works a little loose without this pressure and thus rattle.

    Try this before worrying about internal cables.


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    #34
    jamesd
    Registered Users Posts: 3,416 ✭✭✭jamesd


    lismore7 wrote: »
    After much research, help from boardsies and joint help from my daughter with good hearing....rattle has now been identified but NOT rectified.

    It is indeed a design issue regarding the rear brake cable which runs inside the top frame.
    There seems to be some internal device connected to this cable inside the frame, that over time begins to vibrate louder against the carbon frame, over rough roads.
    Due to the nature of this fault, it will be covered under warranty.
    After speaking with my LBS, it seems this can be a problem with other makes of bikes that have the cables running internally.
    My LBS have dealt with this issue before and will sort it for me.

    Anyone else had this issue?

    Was your bike in or out of warranty?


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    #35
    lismore7
    Registered Users Posts: 259 ✭✭lismore7


    jamesd wrote: »
    Was your bike in or out of warranty?

    Only got the bike end of last year, so only had it 5 months


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    #36
    lismore7
    Registered Users Posts: 259 ✭✭lismore7


    ashleey wrote: »
    Just a suggestion seeing as you say that it's noticeable when you hold the drops:

    You will slightly stress the steerer in the headset. This will lift the compression ring slightly that holds down the top headset cartridge bearing. The bearing then rattles in the frame due to the minuscule gap.

    It is solved by ensuring that the headset cover (the lower most spacer under stem on top of frame) sits slightly above the frame before preloading the bearings when tightening the top cap. This requires micro spacers or shims inside the headset cover. They are basically 1 1/8 inch washers about 0.25mm or 0.6mm thick.

    Then, when you tighten down the top cap, before the stem bolts the spacers and cover squeeze down on the headset bearing to hold it down neatly. The compression ring sort of works a little loose without this pressure and thus rattle.

    Try this before worrying about internal cables.

    This does made sense to me. Just to correct an error, I may have stated that the rattle only happens when hands are on drops...I meant to say hoods. Hands on drops and tops, doesn't cause rattle.
    However that said, your suggestion is also a possiblity and as the bike is still under warranty, I'll mention this to the LBS, as they wil have the bits you mentioned.
    Many thanks


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    #37
    ashleey
    Registered Users Posts: 2,005 ✭✭✭ashleey


    You will be able to see yourself. Loosen top cap and then stem bolts. The headset cover needs to be slightly above the frame. You could lift everything off the steerer column also and check that this top cover when pushed down holds the bearing down


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    #38
    lismore7
    Registered Users Posts: 259 ✭✭lismore7


    jamesd wrote: »
    Have a read here : http://www.bikeradar.com/forums/viewtopic.php?f=40004&t=12841755

    http://www.bikeradar.com/forums/viewtopic.php?f=40004&t=12844482

    http://www.cyclingweekly.cc/forum/tech-312/internal-routing---cable-rattle-15955

    LEt me know how you get on as I have a 2012 cube agree gtc and have a rattle too.

    Your suggestion finally resolved the front rattle.
    I checked out the links you submitted and they highlighted the same problem and offered suggestions.

    It was indeed the rear brake cable which runs inside the top of the carbon frame. It has some kind of connection inside the frame, which over time begins to rattle and gets gradually louder.
    I did what was suggested in yours links and that was to push the cabel at the front stem further into the frame until you hear a click! Which I did and low and behold....no more rattle...Took Ruby Cube out for a spin today and experienced 60ks of silent running....absolute heaven....
    However I'm unsure how long this fix will last and am dropping bike into LBS to have it perrminantly sorted, as it's still under warranty...

    Thanks for your help "jamesd", you were right on the money :) and maybe it might be the same issue you have?


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