Quill stem issues

[Paul D]

Am I being dense, or should a quill stem be held in place simply by
tightening the top bolt (and hence expanding the stem inside the headtube)?

My old Cinelli one expanded the two sides of the stem from inside, my new
Deda one has a bottom section that is pulled upwards on a 45° slant as I
tighten, but I can't get the new one to grip enough to hold the forks.

What am I doing wrong?

 

[Tony Raven]

Paul D wrote:
> Am I being dense, or should a quill stem be held in place simply by
> tightening the top bolt (and hence expanding the stem inside the headtube)?
>
> My old Cinelli one expanded the two sides of the stem from inside, my new
> Deda one has a bottom section that is pulled upwards on a 45° slant as I
> tighten, but I can't get the new one to grip enough to hold the forks.
>
> What am I doing wrong?
>
>

Have you lubricated it so the surfaces slide easily over each other to grip?

Tony

 

[Zog The Undeniable]

Paul D wrote:

> Am I being dense, or should a quill stem be held in place simply by
> tightening the top bolt (and hence expanding the stem inside the headtube)?
>
> My old Cinelli one expanded the two sides of the stem from inside, my new
> Deda one has a bottom section that is pulled upwards on a 45° slant as I
> tighten, but I can't get the new one to grip enough to hold the forks.
>
> What am I doing wrong?

Make sure the wedge is done up a bit further before inserting the stem.
It may just be spinning without tightening.

 

[Simon Brooke]

in message <[email protected]>, Paul D
('[email protected]') wrote:

> Am I being dense, or should a quill stem be held in place simply by
> tightening the top bolt (and hence expanding the stem inside the
> headtube)?

Yes.

> My old Cinelli one expanded the two sides of the stem from inside, my
> new Deda one has a bottom section that is pulled upwards on a 45°
> slant as I tighten,

I'm familiar with both those types, yes.

> but I can't get the new one to grip enough to hold
> the forks.

A quill stem isn't supposed to hold the forks; it should be used in
conjunction with a threaded steerer, and a screw on headset. It's the
headset that holds the forks.

--
[email protected] (Simon Brooke) http://www.jasmine.org.uk/~simon/
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[MartinM]

"Zog The Undeniable" <[email protected]> wrote in message
news:4204b0f2.0@entanet...
> Paul D wrote:
>
> > Am I being dense, or should a quill stem be held in place simply by
> > tightening the top bolt (and hence expanding the stem inside the
headtube)?
> >
> > My old Cinelli one expanded the two sides of the stem from inside, my
new
> > Deda one has a bottom section that is pulled upwards on a 45° slant as I
> > tighten, but I can't get the new one to grip enough to hold the forks.
> >
> > What am I doing wrong?

Is it the right size stem for the steerer? I had one on an MTB that was 1"
going into a 1 1/8" steerer, would not tighten.

 

[Pete Biggs]

Simon Brooke wrote:
> in message <[email protected]>, Paul D
> ('[email protected]') wrote:
>
>> Am I being dense, or should a quill stem be held in place simply by
>> tightening the top bolt (and hence expanding the stem inside the
>> headtube)?
>
> Yes.

(Inside the forks, which are inside the head tube).

>> My old Cinelli one expanded the two sides of the stem from inside, my
>> new Deda one has a bottom section that is pulled upwards on a 45
>> slant as I tighten,
>
> I'm familiar with both those types, yes.
>
>> but I can't get the new one to grip enough to hold
>> the forks.
>
> A quill stem isn't supposed to hold the forks;

I know what Paul means. The stem has to grip the forks otherwise it won't
turn them and will slide down.

> it should be used in
> conjunction with a threaded steerer, and a screw on headset. It's the
> headset that holds the forks.

Holding the forks is no good unless you can turn them as well .

- - - -
Try and tighten up the wedge a little more before fitting.

~PB