The shimano xt m722 9 speed shadow long cage rear derailleur delivers reliable and precise shifting with a stiff and lightweight open design shimano xt m772 shadow rear derailluer features shadow features a super low profile design that reduces the risk of damage from 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