Shimano deore m592 shadow 9 speed rear mechwide link shadow design top normal deore rear derailleur high performance components for serious cycling fun deore is designed to appeal to a wide range of cycling fans featureswide link shadow design top normal deore rear derailleurshadow 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