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The Shimano Rear Derailleur 12s Di2 SGS is a high-performance electronic rear derailleur designed for smooth, precise shifting on modern 12-speed drivetrains. Built around Shimano’s proven Di2 technology, it delivers lightning-fast gear changes at the touch of a button, even under load or on steep climbs. The long SGS cage is optimized to handle a wide-range cassette, making it ideal for riders who demand both top-end speed and low climbing gears. Whether you ride on the road, gravel, or mixed terrain, this derailleur is engineered to keep your drivetrain running quietly and efficiently.
With its integrated electronic motor and advanced chain management, the Shimano Rear Derailleur 12s Di2 SGS helps reduce dropped chains and unwanted noise, while maintaining crisp, repeatable shifts in all conditions. The robust construction is designed to withstand everyday riding and racing, and the clean, compact design integrates neatly with the frame. Compatible with Shimano’s Di2 ecosystem, it works seamlessly with matching shifters, batteries, and wiring to create a fully synchronized shifting experience. For riders upgrading to a modern 12-speed electronic setup, this derailleur is a reliable, future-ready choice.
