too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
A decent carbon frame will be reinforced slightly (or not need it) where the maker expects you to clamp on a front derailleur. But be aware that it's possible to damage the tube by over tightening or with a badly formed rigid clamp body.
Fit the FD around the tube and close the clamp with your fingers. It should fit right and close finger tight without digging in anyplace. Some may need a bit of flex for the curves to match, but if it needs more that a light touch, the clamp will distort the tube when tightened and crack it. Also check mfr. torque specs, or if none are available tighten only as tight as needed for the FD to do it's job. I paint a bit of traction compound inside the clamp to increase friction and lower the needed clamping force.
Great, guys - that eases my mind. Good to see there are lots of clamp-on FD on the market as well.
I have a set of Ultegra brifters I intend to use for the build.
On the other hand I want to use a Sugino triple I bought recently (165mm!).
I want to be sure to eliminate any problems with step synchronization.
Is the Sugino compatible with Shimano?