Deore XT Shadow rear derailleur delivers reliable and precise shifting with a stiff and lightweight open designShadow features a super low profile design that reduces the risk of damage from trail side hazardsSingle tension spring prevents contact with the chainstay resulting in a silent rideDirect cable routing prevents snagging from any trail side hazardsAll-alloy construction leads to lower weight without compromising strength and durabilityFour fluorine-coated link pin bushings make this one of the slickest shifting derailleurs on the trailsHigh rigidity wide outer link braces the pulley body to increase pivot joint rigidity resulting in a crisp shiftStrong return spring for a positive shifting feelGS cage should be used with single and double chainsets onlyMega9, 8 & 7-speed compatibleDurable sealed bearing tension pulleyTop normal spring for use with Rapidfire shiftersWeight 228 g for SGS