Deore XT Shadow 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 springprevents 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 GS cage should be used with single and double chainsets only Mega9, 8 & 7 speed compatible Durable sealed bearing tension pulley Top normal spring for use with Rapidfire shifters Weight 228 g for SGS