deore m591 sgs b blk t/n sgs

Wide link shadow design top normal deore rear derailleur.Features:Shadow 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 hazardsAlloy and steel construction leads to lower weight without compromising strength and durabilityWide link design increases rigidity and service lifeTop normal return spring lends to incredibly intuitive operation when combined with rapidfire shiftersLarge 11 tooth pulleys are used for longer lifeTwo fluorine-coated link bushings for low-friction operation8- and 9-speed compatibleCompatible with 32-36t low sprocketAverage weight 286 grams