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The outer cage of the Record front derailleur is carbon fiber and the inner cage is aluminum, saving significant weight on an inherently lightweight component. Shifting in both directions is lightning-quick, since the composition of the cage gives it such stiffness. The inner cage gets the same nickel plating as Record chainrings, giving it better resistance to wear.
New for 2007 is its metamorphosis to Campy's new Quick Shift (QS) design. The outer cage is longer to complement the change in Ergopower shifters for 2007 -- you can achieve front shifts more quickly with a lighter touch to the lever than in the past. Please note, however, that the QS front derailleur is compatible with pre-2007 Ergopower levers, though shifting between chainrings will require at least two lever pushes. Conversely, you can use a pre-2007 front derailleur with a 2007 QS Ergopower lever, though it will require a higher force to shift.
The braze on version requires 7Nm to fasten the derailleur to your frame. The clamp-on version requires 5Nm. The Record QS is 69g for the braze on version.
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