Any carbon experts out there? I have zero experience with carbon-* anything.

A brand new unused monocoque CF fork arrived from the manufacturer. Steerer has an imperfection in it. Very difficult to take a good picture of it, but I tried my best: enter image description here enter image description here enter image description here

Is this something to worry about? Should I send it back to the manufacturer? Or is this normal on carbon forks?




The shop that sold me the frameset said that having looked at the images they believe this to be cosmetic. They also added that they will send images onwards to the OEM factory for a formal comment.

Additionally the shop suggested to replace the fork unconditionally if I don't feel comfortable riding it. (kudos to the shop on that point)

I have not pressed for immediate fork replacement (if the damage is purely cosmetic, the replacement may have same or more of these artefacts, what do I know... ?)

OEM requested the fork serial number (I assume to check their unit-test records?) and confirmed via shop to myself that they deem this to be purely cosmetic and safe to ride.

Going to build the bike up now.

Thanks everyone for responses.

  • 2
    Almost looks like a hole they’ve imperfectly filled with epoxy? I would contact the manufacturer. If they can’t reassure you that it’s safe to use they should send you a replacement.
    – Michael
    Commented Aug 9, 2021 at 18:46
  • 1
    Just sent an email to manufacturer. Will post back once they reply. Commented Aug 9, 2021 at 19:14
  • Post updated with latest details Commented Aug 11, 2021 at 14:27

1 Answer 1


Looks like something (piece of resin or something) fell into the mold and the operator didn’t bother removing it. The fibers would be intact, so it should be fine. Refer to the manufacturer’s email response for final confirmation of course though.

  • you were right. I have updated my post with the details of my exchange with the bike shop. Commented Aug 11, 2021 at 14:23

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.