These are just the ticket when you've got a braze on front derailleur and a frame that requires a clamp style front derailleur. Simply use one of these and you're back in the game.
These Carbon Look Derailleur Clamps have the look of carbon but with the gripping force of aluminum. They're still lightweight at 17grams, and only you will know that you're not running a super cool carbon clamp.
Choose from 31.8mm or 34.9mm depending on your frame size.