When developing the Ultegra R8100 series, Shimano took a holistic and 100 % performance-oriented approach, because great speed means great responsibility. Faster than ever before, the 12-speed road groupset scores with unparalleled control and comfort anytime and anywhere – whether in an everyman race, on the hunt for a personal best time, or on a companionable ride.
As with the Dura Ace R9200, not only does Hyperglide+ make its way into the Ultegra's components, but also its Di2 parts rely on Wireless technology to simplify operation and ensure smooth shifting.
The Shimano Ultegra Di2 12-speed Rear Derailleur RD-R8150 is a premium road drivetrain component designed for fast electronic shifting, efficient drivetrain performance, and reliable control on every ride. Built as part of Shimano’s Ultegra Di2 12-speed series, it delivers precise rear shifting with the smooth and responsive feel expected from high-performance road components. Ideal for racing, endurance riding, and premium road bike upgrades, it combines lightweight efficiency, dependable operation, and refined Shimano engineering for modern road cycling.
FEATURES
Ultegra Di2 Electronic Shifting
Designed for Shimano Ultegra Di2 12-speed road systems, delivering fast, precise, and reliable electronic rear shifting performance.
Smooth 12-Speed Drivetrain Performance
Provides clean and consistent gear changes across a 12-speed cassette for efficient cadence control and refined road riding performance.
High-Performance Road Integration
Built to work seamlessly within Shimano’s modern Ultegra Di2 drivetrain system for optimized shifting efficiency and dependable operation.
Lightweight and Durable Design
Engineered for a balance of low weight, long-term durability, and dependable performance in demanding road riding conditions.
Ideal for Racing and Endurance Riding
Well suited for competitive riders, endurance cyclists, and premium road bike upgrades requiring smooth electronic drivetrain control.
Trusted Shimano Quality
Manufactured to Shimano’s high standards for precision, performance, and long-lasting drivetrain reliability.
SPECIFICATIONS
- Material: Aluminium
- Usage Bikesport: Road Bike
- Shifting System (Manufacturer): Shimano
- Number Of Gears - Rear: 12
- Shifting Type: Chain - Electronic
- Smallest Sprocket: 11
- Rear Derailleur Cage: Medium
- Rear Derailleur Max. Teeth: 34
- Rear Derailleur Capacity: 39
- Max. Chainring Spread Teeth: 16
- Rear Derailleur Mounting: Conventional
- Collection: Full Year
- Color: Black
- Weight: 262g