Is Epoxy Carbon Safe?

Discuss light weight issues concerning road bikes & parts.
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JScycle
Posts: 251
Joined: Wed Mar 08, 2017 11:41 pm

by JScycle

Hey All,
My fender mount has pulled out of my carbon frame. Can I epoxy it back in place safely?

mattr
Posts: 4673
Joined: Fri May 25, 2007 6:43 pm
Location: The Grim North.

by mattr

Where has it pulled out, what damage has it done to the underlying tube?

by Weenie


JScycle
Posts: 251
Joined: Wed Mar 08, 2017 11:41 pm

by JScycle

mattr wrote:
Fri Jan 18, 2019 9:47 am
Where has it pulled out, what damage has it done to the underlying tube?
Hey. Attached are two photos. One is the mount pushed all the way in/normal the other photo is the mount pulled out as far as it will slip. Basically I can still use the fender it is just wobbly.

Image

Image

mattr
Posts: 4673
Joined: Fri May 25, 2007 6:43 pm
Location: The Grim North.

by mattr

By the looks of that, I'd just run a bead of epoxy round the gap, and push the boss back into place. Leave to cure. Might need to strip stuff down a bit so you can get proper access. And hold it in place with some tape while it cures.

I was expecting some sort of great big ragged hole with torn CF everywhere!

hambini
Posts: 512
Joined: Tue Nov 15, 2016 8:13 am
Location: Cologne, Germany

by hambini

If it's a rivnut you could drill it out and put a new one in.
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by Weenie


wilwil
Posts: 382
Joined: Thu Sep 23, 2010 5:47 pm

by wilwil

hambini wrote:
Sat Jan 19, 2019 9:10 am
If it's a rivnut you could drill it out and put a new one in.
This. I had a rivnut go on my Cervelo BB external cable guide. Bought a Rivnut tool and some Rivnuts for about £35 and it was pretty straight forward. I practiced on a bit of scrap metal first. Dont frig about with a home made rivnut tool made from a bolt as seen on You Tube though.

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