Precision engineered the shimano xtr m972 shadow rear mech is the ultimate in shifting performance and durability as used by elite off road racers the world over shimano xtr m972 shadow rear mech features shadow features a super low profile design that reduces the risk of damage from trail side hazards cold forged alloy links and pivot body39s leads to lower weight without compromising strength and durability four fluorine coated link pin bushings make t