Digital Integrated Intelligence or Di2: with programmed automatic motion at the touch of a switch. The Cues RD-U6070 Di2 rear derailleur is quick, smooth and effortless, making for unmatched drivetrain efficiency no matter what the riding conditions Programmed automatic motion at the touch of a switch makes this derailleur quick, smooth and effortless to shift The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates, corrosion and stretching Using Shimano's shadow plus technology and lowest profile to date, the M8150 will help you squeeze through the narrowest of trails without worry Derailleur contains a saver (fuse) function, where the inner structure is protected from strong impacts Aluminium pulley plates for weight saving and durability Specifically designed to work with 11-speed cassette and drivetrain 11-speed E-tube Di2 compatible Max low sprocket: 50T Total capacity: 39T (Di2 system limited)
