Shimano's Dura-Ace Di2 Bar-End Shifters are for time trial/triathlon bicycles with Shimano's Di2 drivetrain components (sold separately). The one-button design operates only the rear derailleur, shifting up the cassette with one hand, and down with the other. This shifting setup does not operate the front derailleur and should be paired with additional satellite shifters. With a simple, light touch of the easily accessed buttons, you get instant, precise gear changes. And, these beauties feature spot-on ergonomics for smooth, controlled shifting even when you're pushing yourself to your physical limit.
Three decades ago, SRAM was founded on a product called Grip Shift and an idea that shifting a bike should be easier, better and more intuitive. It’s more advanced than the original, but the XX1 Eagle Grip Shift follows in the same tradition of making shifting easier, better and more intuitive. The XX1 Eagle Grip Shift system includes robust internals that make it more durable and its shifting performance more precise. But just like the original, it is total control in the palm of your hand.
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