Shimano Dura-Ace Di2 Rear Derailleur (RD-9070)

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Precise, lightning-fast switching operations on the entire spectrum of a 11-speed cassette - and this in every situation and literally at the touch of a button: the RD-9070 rear derailleur is more compact and lighter than its predecessor and has the E-tube connectors for an extremely simple installation. For the hopefully not occurring crash or other affecting forces, the RD-9070 is like the RD-7970 equipped with a crash mechanism, which disconnects the motor to avoid damage. 

Product Name:Shimano Dura Ace Di2 RD-9070 Rear Derailleur 2x11
Item Code:SHI134779
Material:Aluminium, Carbon pulley plate, titanium bolt
Weight:approx. 217 gram
Version (2/3 speed):2 speed
Cage length:short
Largest sprocket:28 teeth
Overall capacity:33 teeth
Smallest sprocket:11 teeth
Highest difference of chain wheel:16 teeth