Deore XT rear derailleur delivers reliable & precise shifting with a stiff & lightweight open design All-alloy construction leads to lower weight without compromising strength & durability Four fluorine-coated link pinbushings make this one of the slickest shifting derailleurs on the trails High rigidity wide outer link braces the pulley body to increase pivot joint rigidity Mega 9 compatible for use with 9-speed drivetrains Durable sealed bearing tension pulley for low friction & smooth running of the drivetrain Low normal spring uses the spring to select lower gears&44; best suited to use with Dual Control levers Can be combined with Rapidfire shifters Rubber bumper reduces noise when used on non-conventional frame designs Weight: 239 grams SGS