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Seat Collar on Carbon Frame - Question

9.6K views 12 replies 10 participants last post by  biker_in_nyc  
#1 ·
Howdy...Question regarding the proper installation of a seatpost collar on a carbon frame. I have a Ridley Excalibur frame and a Thomson seatpost. The seatpost collar the frame came with looks like it's offset such that the slot in it sits off to the left of the slot in the frame itself (see pic). The red arrow is pointing to the slot in the frame, the yellow arrow to the slot in the seatpost collar. Do I have this setup right? Want to make sure I'm not putting any undue stress on the carbon/frame. I'm using a torque wrench set to 5Nm so I know I'm not over-torquing. Usually on an aluminum frame I'd set it up so the two slots are aligned...assuming the offset as pictured is correct? (or no?) Thanks!
 
#7 · (Edited)
I'm using the stock seatpost collar that came with my 2011 Bianchi Infinito. I removed the collar today and saw that it has lightly gouged the carbon fiber. I can feel an indentation with my finger nail when sliding my hand over it. Do you guys think this is something to worry about? I don't have a torque wrench, but I'm pretty careful to not over torque it by feel. This is my first carbon frame, so I'm extra worried about any damage.

Also, I read about a Campy asymmetrical collar that helps put even pressure around the tube. Isn't this one a similar design?

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Edit:

I rotated slit on collar so that it doesn't match up with frame slit. How does this look? The damage may have been from the collar being matched up previously.

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#9 ·
I went on a long bike ride in NV.
I shipped back the bike (a specialized Allez Elite 2006) home.
The bike store which packaged the bike dismounted it to the point where I don't know how to put it back together:
For the seat stem I have two separate components:
1) The classical collar
2) a ring that appear to be exactly as wide as the frame.
the collar and a internal smaller edge whilst the ring as and external larger edge.
I am completely lost?
I don't know what to do with the ring. I don't recall where it was before.

Anyone has an idea?


See pics below
4.bp.blogspot.com/-qk692rzHiLI/TgVvNcyzXCI/AAAAAAAAALk/DPQCLHBnJqk/s1600/IMG00057-20110625-0056-797450.jpg

2.bp.blogspot.com/-vwnPMrt2B8U/TgVvOQcpjSI/AAAAAAAAAL0/UiqjdsrjWuQ/s320/IMG00059-20110625-0057-701708.jpg

2.bp.blogspot.com/-LbYXiq_2Etw/TgVvNwNHJXI/AAAAAAAAALs/0fXuOYhd5CA/s320/IMG00058-20110625-0057-799210.jpg
 
#11 ·
I went on a long bike ride in NV.
I shipped back the bike (a specialized Allez Elite 2006) home.
The bike store which packaged the bike dismounted it to the point where I don't know how to put it back together:
For the seat stem I have two separate components:
1) The classical collar
2) a ring that appear to be exactly as wide as the frame.
the collar and a internal smaller edge whilst the ring as and external larger edge.
I am completely lost?
I don't know what to do with the ring. I don't recall where it was before.

Anyone has an idea?


See pics below
Image


Image


Image
here you go.