Shimano Dura Ace Di2 RD-R9150 11s rear derailleur
The Dura-Ace Di2 R9150 rear derailleur takes the Shadow technology and introduces it to the road. The Shadow design places the rear derailleur under the chainstay and cassette to give a slimmer profile, which not only helps with aerodynamics but also offers extra protection in crashes. The Shadow design offers faster wheel changes thanks to the fact that it moves the derailleur out of the way of the dropouts. It also offers faster and more precise shifting than ever before. The new derailleur comes in only one cage size that will work with cassette sprockets up to 30T. This means that Dura Ace offers a greater rider tuned ratio than previous models.
Features
- Ergonomic shifting operation without stress.
- Shimano synchronized shift.
- Low profile rear derailleur design.
- Shimano Shadow RD.
- Maintains compact and smooth appearance.
- Maximum sprocket: 30T
- Minimum sprocket: 11T
- Maximum front difference: 16T
- Total capacity: 33T
- Real weight: 198 g
Technology
Synchro Shift
First introduced in XTR Di2 M9050, Shimano’s innovative Synchro Shift is now available with Dura-Ace R9150. Available as a programmable Di2 option, Synchro Shift creates an intuitive experience on the bike through Synchronised front and rear shifting that can be custom programmed by riders.
In addition to traditional “Full” Synchro Shift, riders can optionally select “Semi” Synchro Shift. This intuitive new mode automatically reacts when the rider shifts from one chainring to another, automatically shifting the rear derailleur to minimise the gear step, thus preserving the rider’s rhythm.
Shimano D-Fly SM-EWW01 not compatible.
Shimano battery SM-BTR2-1 not compatible.