Extending carbon fork steer tube

[xFree]

I have modified the original expansion plug to extend my steer tube length by ~2cm.
Is there any potential problem with this setup?







With stem

[latman]

At least the bottom of your stem will be clamping the steerer tube !

[michel2]

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 ?

[socratease]

Is there any potential problem with this setup?

Oh god yes

[Mattias Hellöre]

Depends on how thick the carbon tube is, but for normal road riding probably OK.

[em3]

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

[xFree]

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.

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.

[Fatbiker]

Cinelli Grammo titanium

[ElDuderino]

side note, that stem has a TON of stack height. perhaps use something with lower profile?

[Svetty]

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?

[ChiZ01]

that stem is at least 20mm taller then every other 40mm stack stems