Campagnolo's renowned Electronic Power Shift (or EPS) drivetrains change gears with remarkable smoothness and efficiency, but if you want to install one on a frame designed for a clamp-on style front derailleur, you're going need this to finish the job. The Campagnolo EPS Front Derailleur Clamp comes in either 35mm or 32mm diameters, clamping onto seat tubes and to simulate a braze-on style mount that accommodates any EPS front derailleur.