Shimano Dura-Ace R9150 Di2 Rear Derailleur 11-speed spd-sl Using a carbon fibre and

Using a carbon fibre and alloy spider and five titanium sprockets

drivetrain and other moving parts

Get the chain really wet

Lighter and stiffer cassette sprocket construction reduces inertia and increases acceleration

Shimano Dura-Ace R9150 Di2 Rear Derailleur 11-speed spd-sl Using a carbon fibre andThe DURA ACE 9100 derailleur blends an aerodynamic SHADOW design with enhanced range options in a lightweight, attractive mechanism aimed at discerning road cyclists. The RD 9150 DI2 version offers the digital precision of SHIMANO electronic shifting and synchronized shiftin Ergonomic shifting operation without stress SHIMANO synchronized shift Low profile rear derailleur design SHIMANO SHADOW RD Race endurance for less damage in crash Maintains