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The Shimano Rear Derailleur 12s Di2 is a high-performance electronic rear derailleur designed for modern 12-speed drivetrains. Built around Shimano’s proven Di2 technology, it delivers fast, precise and consistent shifting at the touch of a button, even under load or in challenging conditions. Electronic actuation removes the need for traditional mechanical cables, reducing friction and eliminating cable stretch, so your shifting performance stays crisp and reliable over time with minimal maintenance.
This derailleur is engineered to work seamlessly with compatible Shimano 12-speed Di2 shifters, chains and cassettes, creating a fully integrated system for road or performance-oriented bikes. Its refined cage design helps maintain secure chain retention across the cassette, while optimized geometry supports smooth, quiet gear changes. Riders benefit from programmable shifting options, allowing customization of shift behavior through Shimano’s ecosystem where supported. Whether you are racing, training or tackling long endurance rides, the Shimano Rear Derailleur 12s Di2 offers a clean, modern setup with the accuracy and confidence that only electronic shifting can provide.
