I have a new carbon roadbike frame with in the head tube a cable stop built in.

From the outside of the headtube the outercable ends in it, and then it guides the innercable through the frame.

This cablestop (alu hollow tube) can be seen at the inside of the headtube. It's partly uncovered and I think it’s a bad construction. Vulnerable for breakingout (see image)

 

I want to cover it on the inside with tiny pieces of carbon so the cable stop will be totally locked up on all sides.

 

Think I only need a few pieces of carbon of 2 x 4 cm and some resin and hardener.

What do you advise me?

Hope you can help me out

Yup ... Carbon fibre is electrically conductive and will cause galvanic corrosion, if left in direct contact with aluminium ...  Anyone making Alu inserts in CF, should wrap the alu part in glass or kevlar before bonding it into the CF. This is especially important if you bond into holes cut through CF sheet or tubing, as that WILL bring "raw" carbonfibre into contact with the Alu part.

Do not accept a brand new product with this sort of construction error, unless it was a real bargain ....

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