Shimanos direct mount compatible rear derailleur system gives more space around the rear frame dropout resulting in easier rear wheel removal but also allows frame designers to shorten chain stays increase axel sizes and move suspension pivotsdirect mount gives a simpler cleaner lookdeore xt shadow dyna sys11 11 speed 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 tr