Deore XT Shadow Dyna-Sys 10-speed rear derailleur delivers reliable and precise shifting with a stiff and lightweight open design. Shadow features a super low profile design that reduces the risk of damage from trail side hazards. Single tension spring prevents contact with the chainstay resulting in a silent ride. Direct cable routing prevents snagging from any trail side hazards. All-alloy construction leads to lower weight without compromising strength and durability. Four fluorine-coated link pin bushings 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 resulting in a crisp shift. Strong return spring for a positive shifting feel. Improved cable pull ratio provides a more accurate shift action making the system less prone to contamination and trail chatter. Dyna-Sys 10-speed compatible only. Durable sealed bearing pulleys. Top normal spring uses the spring to select higher gears. Weight 234 grams approx. Can be used direct mount.