BB30 press fit bearings loose- Mtbr.com
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  1. #1
    Dad
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    BB30 press fit bearings loose

    I'm replacing the bearings in a Trek 9.9 elite and am finding that the new bearings, which are definitely the right size, go in and out of the BB cups with ease and don't require any form of pressing to get them in. Does that mean my frame is buggered? Surely the bearings won't funtion properly if they're lose?

  2. #2
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    BB30 or PF30 - you mention both?
    I gather BB30 should be able to be inserted by hand pressure.
    The Park site says:
    Typically, the bearings are a mild press fit and will remove easily.

    If the press fit into the frame is too loose, the bearings may move in the shell when stressed by pedaling. This results in a creaking sound. To resolve this, first check the torque on crank bolts to determine if the crank-to-spindle interface is the source of the noise. If this fails and there is still creaking, it may be the cartridge bearing moving in the shell. The bearings should be removed and new ones installed. Press the new bearings into the frame using a retaining compound such as Loctite® RC™ 609. Even using a threadlocker such Loctite® 242 at would be better than pressing the bearings into the shell dry.

  3. #3
    Dad
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    Awesome! Thanks

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