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Shimano's Dura-Ace Rear Derailleur boasts a light and reliable cold-forged-aluminum body with a carbon cage and a wide pivot design that boosts rigidity for smooth, speedy shifts. Fluorine-coated pivots minimize friction for nearly effortless shifting. And, the oversize sealed-bearing pulleys are silky smooth, ultra quiet, and keep out dirt and water. Plus, the 7900 accepts up to a 28-tooth cassette cog for even greater gearing possibilities.
The Dura-Ace Rear Derailleur is 10-speed compatible.
For optimum shifting and braking, Shimano 7900 Dura-Ace components are best as a system (they're not recommended for use with previous versions of Dura-Ace).
