The derailleur was torn apart so I ordered new seat stays and have to exchange (one of them).

I'm not sure how to do it, there are some bearings fastened by screws where hex-wrenches seem to fit on both sides but I am a bit afraid to use brute force and possibly break something.

This is what it looks like: https://goo.gl/photos/Cq8kWhYF8ES3ouBEA

Shall I just try to unscrew that pulling the hex wrenches into opposite directions or I need some special tools?

  • I would expect the manufacturer will supply instructions, which will include torque values for fasteners.
    – Criggie
    Sep 30, 2015 at 22:39
  • in fact I can unscrew the "inner" screws but the outer ones just turn around, so I cannot take out the seat stay out of the frame yet... The only thing I get from their instruction is that the torque value is 8Nm or something.
    – Greg
    Sep 30, 2015 at 22:47
  • Carbon is very easy to damage. Maybe have a professional handle the repair if you're not sure how to do it. Sep 30, 2015 at 23:17
  • done! however.. the seat strays they sent me are too short. hooray bloody hell!!!
    – Greg
    Sep 30, 2015 at 23:20

1 Answer 1


I basically did it myself, i needed neither any special tools nor brute force.

  • 2
    I hope you used the correct threadlocker on those bolts!
    – JonR
    Sep 30, 2015 at 23:26

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