With the fast and accurate Di2 shifting technology the Shimano 12-speed Ultegra RD-R8150 rear derailleur is extremely versatile thanks to a single cage length option compatible with 11-28 11-30 and 11-34 cassettes.Compact design includes an integrated wireless unit charger switch Wider range capacity Max. low sprocket 34t LED status indicator Battery indicator pairing adjust mode etc.
| Largest Cog | 34 |
| Rear Der/Shifter Compatibility | Shimano Road Di2 |
| Rear Derailleur Mount Type | 10x1 Standard |
| Drivetrain Speeds | 12 |
| Chain Wrap Capacity (teeth) | 39 |
| Cage Length | Medium |
| Color | Black |
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