You should be able to "feel" it if you are shoving the stem's bottom and
the wedge into the butted portion. To be safe, let it drop all the way
down, then pull it up a cm and tighten.

Otherwise, get a stem with a shorter quill.

See also *Hands Up! Adjusting Handlebar
Height*<http://sheldonbrown.com/handsup.html>
*Note:* Steerers <http://sheldonbrown.com/gloss_st-z.html#steerer> are
butted <http://sheldonbrown.com/gloss_bo-z.html#butted> at the bottom, so
the hole in the steerer is constant-diameter until near the bottom, then
the walls taper inward in the butted section.

It is *vitally important* that the stem extender (or stem) not be inserted
so far that the wedge is installed where the steerer is narrowing, or it
could come loose unpredictably.

When this happens, only the edge/corner of the quill or wedge contacts the
steerer, and it is trying to "grab" a slanted surface.

This is sometimes a problem on smaller frames if you try to insert the stem
or a stem riser too far down into the steerer.

[image: Stem Inserted Too Far]

Illustration by Nicholas Flower

The term "stem" is sometimes also used to refer to a
valve.<http://sheldonbrown.com/gloss_u-v.html#valve>


On Tue, Feb 12, 2013 at 9:38 PM, Michael <john11.2...@gmail.com> wrote:

> Bars at saddle level, which puts the base wedge of Technomic stem in
> steerer tube at DT/HT junction level.
>
> Sheldon Brown wrote about being careful to not let stem get too low if
> steerer tube is butted.
>
> *Anyone know if Bleriot steerer tube is butted*? And if so, how far down?
>
> Thanks for any help. Maybe Grant would be kind enough to inform on this.
>
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-- 

-------------------------
Patrick Moore, Albuquerque, NM, USA
For professional resumes, contact Patrick Moore, ACRW
http://resumespecialties.com/index.html
-------------------------

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