Rear Derailleur Shimano Ultegra DI2 12 Speed RD-R8150

Rear Derailleur Shimano Ultegra DI2 12-Speed RD-R8150

When developing the Ultegra R8100 series, Shimano adopted a holistic and 100% performance-oriented approach, because great speed implies great responsibility. More rapid than ever, the group of 12-speed road bikes offers unparalleled control and comfort at any time and anywhere, whether in a race for all audiences, in the quest for a better personal time or on a ride in company.

As in the Dura Ace R9200, Hyperglide+ is not only incorporated into the components of the Ultegra, but its Di2 parts also rely on wireless technology to further simplify operation and ensure smooth shifting.



Rear derailleur Shimano Ultegra Di2 RD-R8150
The Di2 actuators in the front and rear derailleurs of the current Ultegra series allow for a significantly higher movement speed for a shorter movement time when shifting, and the corresponding rapid shifting processes.

The rear derailleur Shimano Ultegra Di2 RD-R8150 accelerates the shifting process by 58% compared to the previous generation of the Dura Ace RD-R9150 model. The derailleur, with a uniform cage length and an increased transmission ratio of 34 teeth, is not only faster than ever, but also ensures very precise operation in all conditions.

The integrated transmitter ensures wireless communication with the brake/shift STI levers and, therefore, guarantees a podium-worthy, rapid, and precise gear change. Through the use of Bluetooth and ANT+, it is also responsible for transmitting data to the Shimano E-Tube Project and E-Tube Ride apps, as well as to third-party devices.

In addition to the charging connector, the rear derailleur has a button for certain Di2 adjustments and an LED status indicator, which reports, for example, the battery level, pairing, and adjustment mode.