Stem tightening query

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  • Stem tightening query
  • Duane…
    Member

    Try and scav another stem of a mate/lbs and see if that has the same problem 🙂

    Premier Icon iainc
    Subscriber

    Don’t know if this is a problem or not – I have an EA70 O/S Stem on marzocchi bomber forks. The steerer is cut correctly to the right height for the spacers and stem etc. To get the stem tight enough I am having to tension the bolts up such that the stem actaully completely ‘closes’ round the steerer – i.e. there is no gap whatsover at the back, betwen the bolt flanges.

    I am thinking either the stem is slightly too ‘large’ in it’s steerer hole, or the steerer tube is a touch too narrow in diameter.

    Is this a problem, or should I just tighten up and forget ? To do something I would probably have to change the stem to something of a slightly different design, Thomson or similar

    Premier Icon iainc
    Subscriber

    might try that, I guess it’s machining tolerances on either the stem or the steerer.

    Trimix
    Member

    If there is no gap and you tighten the bolts up you will just stretch the bolts. They will then fail and you will fall off. The gap is there for a reason.

    Dibbs
    Member

    If there is no gap and you tighten the bolts up you will just stretch the bolts.

    or If there is no gap you’ve probably already overtightened the stem and deformed the clamp maybe a torque wrench would be a good idea next time.

    Premier Icon iainc
    Subscriber

    ‘probably already overtightened the stem ‘….err, no, ‘cos the reason I have had to tighten it further is that is was loose -)

    Premier Icon woody2000
    Subscriber

    Not a 1″ steerer is it? Marzocchi still make ’em AFAIK

    GNARGNAR
    Member

    1.5′ stem?

    cynic-al
    Member

    LOL at “wrong stem/steerer” sugestions, the stem would not clamp at all.

    Does sound an odd one though. Take it faces of stem and steerer are clean & free of grease? Bolt threads greased?

    Premier Icon matt_outandabout
    Subscriber

    Can you post a pic up?

    andywhit
    Member

    Sounds like it’s definitely oversized then!

    Premier Icon takisawa2
    Subscriber

    Coke can shim time. If your brave enough.
    I’d get another stem.

    Premier Icon iainc
    Subscriber

    cynic-al – spot on -) ….. and yes, all clean with grease where it should and shouldn’t be.

    Wiggle is my friend, Thomson X4 just ordered -)

    Thanks all

    cynic-al
    Member

    “grease where it shouldn’t be” ❓ There’s the answer LOL111

    Premier Icon iainc
    Subscriber

    ah, the power of English ! doh……. you know what I meant -)

Viewing 15 posts - 1 through 15 (of 15 total)

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