Originally Posted by Autobus
Dang. Can you remove a braze -on mount easily from a carbon bike and install a clamp - on?
No, clamp-ons are not recommended for CF.
On my wife's CF bike I was able to grind te slot deep enough for a 49t chainring. I used a dremel tool and a round file. The metal is soft and grinds really quickly so be careful if you try it.
If your hanger is held on with screws you might be able to remove it and have a custom hanger made at a machine shop. That has been done by others.
Al