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Cracking clean combo


Ónodi István

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Hey guys!

I tried looking up carbon repair topic, but couldn't find any.

I recently bought a clean combo but it doesn't look too promising😬

The cracks are getting bigger and scarier.

Have you guys ever repaired one with similar issue or know anyone who repaired one?

20230506_105844.jpg

20230506_105827.jpg

20230506_104411.jpg

Edited by Ónodi István
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9 hours ago, Ónodi István said:

Hey guys!

I tried looking up carbon repair topic, but couldn't find any.

I recently bought a clean combo but it doesn't look too promising😬

The cracks are getting bigger and scarier.

Have you guys ever repaired one with similar issue or know anyone who repaired one?

20230506_105844.jpg

20230506_105827.jpg

20230506_104411.jpg

To me it looks like they are some aluminum thread inserts, where the delamination started.

If cracks are apparent, then the delamination is quite far. I think the structure is too altered to attempt to repair it!

In addition it seems to me that it is quite difficult to compress the fiber correctly at this section of the stem. But I am not a carbon specialist.

 

The whole design is quite ambitious. If the fork steerer, the aluminum insert or the stem tolerances are slightly off (I won't be surprise at all if it is the case on many trials fork and stem), the stress increases at the clamping part.

They are some clamping marks on the inside of the stem clamp. It looks like the aluminum insert caused them. I assume the clamping force was quite high.

 

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