Shimano Dura Ace Di2 RD-R9150-SS rear derailleur

The new Shimano Dura Ace R 9150 series impresses with its Syncro Shift function, greater shifting capacity and, of course, perfect workmanship.

The Dura Ace RD R9150 rear derailleur, with its Syncro Shift function programmable via the Bluetooth interface (EW-WU111), allows the rear derailleur and front derailleur to be operated using just a single lever. The system then automatically selects the front derailleur function to shift into the next gear. Precise, lightning-fast gear changes at the touch of a button, in any situation.

Precise, lightning-fast gear changes at the touch of a button, in any situation. The Shimano Dura Ace RD-9150 Di2 rear derailleur is even more compact and lighter than its predecessor and features E-Tube connectors for extremely easy installation. Equipped with a crash mechanism that disconnects the connection to the motor in the event of strong external forces to prevent damage.

Synchro-Shift technology

Synchro-Shift technology greatly simplifies shifting and significantly reduces the number of decisions riders need to make whilst riding. Particularly in critical race situations or when riding at the limit, riders often have to juggle a multitude of decisions alongside the physical strain, which can lead to errors and poor choices. The fewer decisions there are to make, the better the decisions will be and the more attention can be focused on the race. This is precisely what Shimano Synchro-Shift technology enables, always selecting the optimal next-higher or next-lower gear combination, regardless of whether this requires shifting at the rear derailleur and/or the front derailleur.

Shimano Synchro-Shift functions

• Full Synchro-Shift: The front derailleur responds to the shifting operations performed by the rider on the rear derailleur. Essentially, this means that only a single shifter with two buttons is required to operate both the rear and front derailleurs.
• Semi Synchro-Shift: The rear derailleur responds to the gear changes the rider makes on the front derailleur. The rear derailleur automatically performs the necessary compensatory shifts for small changes in cadence when shifting up or down on the front derailleur.

Shimano Shadow RDR 9150

With its sophisticated technology, the Shimano Shadow rear derailleur is particularly well-suited to a more aggressive riding style. Its extremely slim profile brings a number of improvements. Thanks to its flat design and construction based on single-pivot tensioning, the rear derailleur does not strike the chainstay even under the harshest conditions. The shifting operates smoothly and quietly.

Shimano Di2 installation:

Installing Shimano Di2 components is almost easier than fitting traditional gear systems. The standardised cable connectors and junction box ensure straightforward and quick installation. The shift levers are connected to Junction Port A on the junction box; a cable runs from Junction Port A to Junction Port B on the junction box, and from there the cables run to the rear derailleur, front derailleur and battery. The battery can be mounted externally on the bottle cage or internally in the seat tube or down tube. Frames specifically designed for this purpose are required for internal cable routing.

To use the wireless function, the new BT-DN110 battery and the EW-WU111 Bluetooth module are also required.

Shimano Dura Ace DI2 RD R9150 Rear Derailleur Technical Specifications:

• Can only be used in combination with the Shimano Dura Ace DI2 STI 9150 and 9070 shift-brake levers
• Wide Link Design: the wider outer parallelogram increases stiffness
• Cold-forged aluminium
• 11-speed compatible
• Ball-bearing shift pulleys
• Max. difference at the front: 16 teeth
• Largest shiftable sprocket, rear 30 teeth
• Total capacity: 35 teeth
• Weight 204 grams

Herstellerinformation: SHIMANO INC., 3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan, www.shimano.com | EU contact: Shimano Europe BV, High Tech Campus 92, 5656 AG Eindhoven, The Netherlands, www.shimano.com