steerer extender safe for cyclocross?

Quoted message said:

I've got a 60cm redline conquest I've been racing for a couple years.
I'd like to race the bars up a couple inches.

The steer tube is only 265mm, so there's no room for more spacers below
the stem. And I can't really get a high rise stem because I need the
horizontal reach.

So I can either buy a new fork with a 300mm steer tube, or try a
"steerer extender" which bolts on to the steer tube like a stem
normally does and adds a couple inches to the steer tube length.

The fork works fine so I don't really care to replace it. But would
that extender by safe for use on a cyclcross bike? It seems pretty
safe to me but cross is pretty hard on equipment and I'd like to hear
any advice from those who know.

I don't know if anyone can give you an absolute promise of reliability.
I'm very tall (6'10"😉 and rode a MTB for several years with an extender.
The type I had used a wedge, like a conventional quill stem, although it
was a threadless steerer. I never had any problems with it, nor did it
feel any different than a fork with a long steer tube. I weighed 245 at
the time and it was a rigid fork, riding was mostly off road over rocky,
rooty trails.

Quoted message said:

I've got a 60cm redline conquest I've been racing for a couple years.
I'd like to race the bars up a couple inches.

The steer tube is only 265mm, so there's no room for more spacers below
the stem. And I can't really get a high rise stem because I need the
horizontal reach.

So I can either buy a new fork with a 300mm steer tube, or try a
"steerer extender" which bolts on to the steer tube like a stem
normally does and adds a couple inches to the steer tube length.

The fork works fine so I don't really care to replace it. But would
that extender by safe for use on a cyclcross bike? It seems pretty
safe to me but cross is pretty hard on equipment and I'd like to hear
any advice from those who know.

I don't know if anyone can give you an absolute promise of reliability.
I'm very tall (6'10"😉 and rode a MTB for several years with an extender.
The type I had used a wedge, like a conventional quill stem, although it
was a threadless steerer. I never had any problems with it, nor did it
feel any different than a fork with a long steer tube. I weighed 245 at
the time and it was a rigid fork, riding was mostly off road over rocky,
rooty trails.

No cyclo-cross experience but I recently (about 50km ago) added a Zoom
threadless stem extender/raiser/riser (whatever you wanna call it - I don't
think Zoom even knows)

There are single and two-bolt models - I have the two bolt, T6061 model on a
1-1/8" steerer tube. Adds 3+ inches of rise (with all spacers below) and
it's gronked down so well I don't even know it's there. For all intents and
purposes, it's like it's been welded in place. It's beefy too. I'd break a
handlebar before it.

I wouldn't hesitate to ride off-road with this thing. As far as I can tell,
it's as secure as any threadless stem with properly tightened bolts. It came
with an extra long bolt for securing the cap to the star nut too. $15 ish.

C.

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Quoted message said:

I've got a 60cm redline conquest I've been racing for a couple years.
I'd like to race the bars up a couple inches.

The steer tube is only 265mm, so there's no room for more spacers below
the stem. And I can't really get a high rise stem because I need the
horizontal reach.

So I can either buy a new fork with a 300mm steer tube, or try a
"steerer extender" which bolts on to the steer tube like a stem
normally does and adds a couple inches to the steer tube length.

The fork works fine so I don't really care to replace it. But would
that extender by safe for use on a cyclcross bike? It seems pretty
safe to me but cross is pretty hard on equipment and I'd like to hear
any advice from those who know.

Thanks,
Erik