TheShimano Deore M6000 Rear Derailleurhas a Wide link Shadow design Dyna-Sys 10-speed top normal Deore rear derailleurShimano Deore M6000 GS Rear Derailleur Highlights-Shadow Plus features a super low profile design that reduces the risk of damage from trail side hazardsShadow Plus uses a chain stabilising switch that when on will reduce chain bounce in rough terrainDirect 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 axle sizes and move suspension pivotsSingle 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 operationDyna-Sys HG-X 10-speed compatible onlyCompatible with 42T low sprocket