SRAM Apex Clamp-On Front Derailleur

The Apex Braze-on Front Derailleur (image of Clamp-On version unavailable from manufacturer).
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Details
For smooth downshifts and fast upshifts, SRAM's Apex Front Derailleur is engineered for success. Its aluminum body is light as a feather while its steel cage is stiff for precision shifts everytime. The Apex Front Derailleur shifts great on standard and compact cranksets, too.