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PostPosted: Fri Jul 20, 2012 12:14 am 
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I have modified the original expansion plug to extend my steer tube length by ~2cm.
Is there any potential problem with this setup?

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Last edited by xFree on Fri Jul 20, 2012 7:02 am, edited 1 time in total.
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Posted: Fri Jul 20, 2012 12:14 am 


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PostPosted: Fri Jul 20, 2012 12:20 am 
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At least the bottom of your stem will be clamping the steerer tube !


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PostPosted: Fri Jul 20, 2012 12:26 am 
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Isnt your expander going to work as a lever ? If your stem clamps on the ally bit the force on the carbon clambing area is going to be bigger than in a normal situation ?


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PostPosted: Fri Jul 20, 2012 6:19 am 
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xFree wrote:
Is there any potential problem with this setup?


Oh god yes


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PostPosted: Fri Jul 20, 2012 6:22 am 
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Depends on how thick the carbon tube is, but for normal road riding probably OK.

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PostPosted: Fri Jul 20, 2012 6:35 am 
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michel2 wrote:
Isnt your expander going to work as a lever ? If your stem clamps on the ally bit the force on the carbon clambing area is going to be bigger than in a normal situation ?



+1

Simply to risky considering the high torsional forces applied to the steer tube...not worth it!

Just curious, where did u find such a gizmo, or is this something you CNC'ed yourself?

EM3

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PostPosted: Fri Jul 20, 2012 8:39 am 
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Mattias Hellöre wrote:
Depends on how thick the carbon tube is, but for normal road riding probably OK.
The fork is 1" Colnago Star Carbon fork and the tube thickness is ~3 - 3.5mm.

em3 wrote:
michel2 wrote:
Isnt your expander going to work as a lever ? If your stem clamps on the ally bit the force on the carbon clambing area is going to be bigger than in a normal situation ?



+1

Simply to risky considering the high torsional forces applied to the steer tube...not worth it!

Just curious, where did u find such a gizmo, or is this something you CNC'ed yourself?

EM3

My friend made this one for me with his CNC.


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PostPosted: Fri Jul 20, 2012 8:44 am 
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PostPosted: Mon Mar 11, 2013 4:51 pm 
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side note, that stem has a TON of stack height. perhaps use something with lower profile?

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Posted: Mon Mar 11, 2013 4:51 pm 


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PostPosted: Mon Mar 11, 2013 5:11 pm 
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Can't really tell whether it's safe or not without knowing the height of the spacer stack below the stem.

It might look shite but can't you just flip the stem?


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