Shimano
The Shimano Ultegra Di2 RD-R8150 rear derailleur is a 12-speed electronic shifting component designed for road bikes, offering fast and precise shifting with wireless communication.
Checked Jul 2, 2026 14:27
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The Shimano Ultegra Di2 RD-R8150 rear derailleur is designed for road bikes and features a 12-speed drivetrain with electronic shifting. It offers fast and precise shifting with wireless communication to the STI brake/shift levers via a built-in transmitter using Bluetooth and ANT+ technology. The rear derailleur has a uniform cage length and an increased gear ratio of 34 teeth, providing highly precise functionality under all conditions. Compatible with Shimano Dura-Ace, Shimano Ultegra, and SRAM Level brake systems. Use the verified attributes to compare available versions before choosing.
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