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  1. #1
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    BMC Fourstroke 02 creak

    Hey, I have a BMC Fourstroke 02 which has racked up a lot of miles throughout its life. Now there is some sort of creeking which sounds like it is in the frame, and I can't seem to fix it. It creeks when when the bike is under torque like when climbing or rock crawling, but not when desending or on smooth flats. It makes no difference if I lock out the suspension. I am thinking possible the pivots or the cranks? however it is not related to my pedalling tempo. Any ideas?

  2. #2
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    Take out the cranks and BB. Clean and lube everything and put it back. Now see if the sound persists.

  3. #3
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    Quote Originally Posted by the-one1
    Take out the cranks and BB. Clean and lube everything and put it back. Now see if the sound persists.
    +1

    Also pull the pedals and grease them along with the seatpost (if both frame and post are carbon use a carbon spec lube)

  4. #4
    Too easily annoyed.
    Reputation: morgan1819's Avatar
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    +2

    Add cleaning and lubing the seat rails, in addition to the post, crank, chainrings, pedals, etc. These are all pretty easy things to rule out before diggin' in to the frame and shock pivots.
    Sounds like you have a ton of miles on it, so it may indeed be time to maintain the pivots....

  5. #5
    Professional Speed Bump
    Reputation: captainjoon's Avatar
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    These guys are probably right...but there's another possibility.

    I had an experience where my frame started creaking as well...but it turned out that it was something I installed. I had a 2007 Trailfox that had a design flaw. The seat clamp was built in to the frame but it was very weak so every time I went for a ride, the saddle dropped about 1 inch by the end of the ride. So in order to prevent that, I placed a clamp on the seat post so that the the clamp would prevent the drop.

    The frame started creaking and I thought that I need to do maintenance on the BB and bearing in the headset, but later it turned out it was the clamp on the seat post.

    Anyways...that's my dumb story.

  6. #6
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    I occasionally get an annoying creak on my TF and it is usually the pivot bolts on the rocker arm that connect it to the frame. Just pull it off and grease it up.

    If it happens while I'm riding, I usually just put some water on it and it goes away until I finish and can take it apart.

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