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Creaking pressfit bottom bracket

Discussion in 'Bicycle Mechanics and Repairs' started by confusedcyclist, 21 Apr 2017.

  1. confusedcyclist

    confusedcyclist Über Member

    I recently swapped out the stock BB from my 2014 Giant Defy 1 this week after it developed a creak, this is the first time I have had to do so in 6k miles of riding on the bike. I replaced the stock BB71-41B with a BB92-41B(BB86). The creak disappeared, for a whole 20 miles or so and has returned with a vengeance.

    Do these press fit BBs require grease or threadlock for creak free operation? The interwebs is full of misinformation and conflicting advice, so hoping for some expert opinion.

    And yes, I have already ruled out:

    Pedal creaks
    Headset creaks
    Chainring bolt creaks
    Seat post/clamp creaks
    Saddle rail creaks
    Crank bolt creaks
    Drop out creaks.

    It definitely seems to be originating from the BB, only under power, in or out of the saddle, and hands on or off the bars.
     
  2. Yellow Saddle

    Yellow Saddle Veteran

    Location:
    Loch side.
    https://www.cyclechat.net/search/9247045/?q=Press+fit+BB&o=relevance&c[user][0]=39857

    https://www.cyclechat.net/threads/noisy-bb.214251/
     
  3. Eddy

    Eddy Guru

    My creak on the same BB comes and goes, came back the other day , usually creaks for a few days after I have been out cycling in the rain.

    Next one I fit I am going to smear some silicon around it before I press it into the frame.
     
  4. OP
    OP
    confusedcyclist

    confusedcyclist Über Member

    Sorry should have known better and searched first. Mod feel free to close thread.

    So it's just a design flaw. Right. I'm running this bike into the ground and getting something with an external BB next time. I've had it with giant frames!
     
    Last edited: 21 Apr 2017
    Bimble likes this.
  5. Bimble

    Bimble Bimbling along ... Staff Member

    Scoosh likes this.