Shimano RD-7400 is a high-performance rear derailleur designed for precise and efficient shifting. It features the Shimano Index System (SIS) for simplified lever operation and stable pedaling power during shifting. The Double Spring system and Double Servo Panta mechanism improve shifting efficiency, while the Centeron guide pulley ensures proper chain alignment. The derailleur is compatible with a wide range of drivetrain setups, including double and triple chainrings and cassettes with up to 26 teeth. It is made from lightweight alloy and weighs only 189 grams.