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  1. #1
    mtbr member
    Reputation: Lost Biker's Avatar
    Join Date
    Jun 2009

    Preload Headset when replacing stem?

    Got a question - looking to replace stem and was told by someone i needed to preload headset bearing. I googled this and couldnt find anything useful. Is preloading bearings required for changing out stem? If so, whats the proper way to preload bearings.

    For what its worth:

    Canecreek IS-110 threadless headset
    Replace old 100mm 10deg rise stem with Thomson 70mm 0deg.

  2. #2
    mtbr member
    Join Date
    Aug 2008
    Unscrew top cap, Unscrew stem clamp screws. Remove old stem. Put new stem on. Put top cap on. Screw down top cap screw to PRELOAD bearings. Once play has been eliminated and is smooth, tighten down stem clamp screws.

  3. #3
    meow meow
    Reputation: b-kul's Avatar
    Join Date
    Sep 2009
    just make sure the top of the stem/ spacer is 2-5mm higher than the steerer tube or you will not be able to get rid of the play.

  4. #4
    mtbr member
    Reputation: Lost Biker's Avatar
    Join Date
    Jun 2009
    ok - so the act of putting top cap on and tightening it preloads the headset bearings. got it!

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