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  1. #1
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    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
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    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
    usually cranky
    Reputation: b-kul's Avatar
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    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
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    ok - so the act of putting top cap on and tightening it preloads the headset bearings. got it!

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