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Shimano Ultegra Braze-On Front Derailleur

Shimano Ultegra Braze-On Front Derailleur
The Ultegra Braze-On Front Derailleur (Triple Chainring). Image of Double Chainring model unavailable from manufacturer.
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If you're looking for a quick-shifting, super-light front derailleur, you've found it in Shimano's Ultegra. The wide pivot-link design suppresses flex for light, fast and precise shifts, even under load. And this fine derailleur is built tough for reliability and durability, too.

Braze-on front derailleurs mount to either a built-in frame mount (left) or to a clamp mounted around the seat tube like the one on the right.
Capacity is calculated by subtracting your smallest chainring's tooth count from the largest chainring's tooth count. Example: 53/39 chainrings: 53 - 39 = 14-tooth capacity.