Originally Posted by HillRider
If you have a braze-on fd mounting tab and it won't let the derailleur go low enough for proper (1-2 mm) clearance with the 48T ring, the shifting will be less than ideal but it will still work. Now you know why clamp-on fd mounts have become nearly universal if the seat tube shape will allow it.
Dang. Can you remove a braze -on mount easily from a carbon bike and install a clamp - on?