TheSRAM GX 1x11 Speed Rear Derailleurfeatures a whole host of expertly developed technologies, high-quality materials and precision engineering to deliver smooth and swift shifting. ThisSRAM Rear Derailleuris crafted from lightweight, stiff and durable aluminium, resulting in a feather-light weight with bombproof durability. Kitted out with X-Horizon and Roller Bearing Clutch technology, this derailleur produces super-fast exact shifting as the large upper pulley offset design maintains a constant chain gap across all gears, eliminating ghost shifting, chain slap and bounce. TheGX Derailleurkeeps maintenance on the go fast and simple with Cage Lock to aid wheel removal, application and even chain installation and X-Actuation maintains stability and balance of components, making shifting ultra-responsive and fluid. This derailleur excels in muddy conditions with mud-shedding capabilities provided by the 12-tooth X-Sync pulley wheels to keep you riding smooth even when the ground isn’t. Highly responsive, your performance will be superior with theSRAM GX 1x11 Speed Rear Derailleur! SRAM GX 1x11 Speed Rear Derailleur Features Large upper pulley offset automatically adjusts chain gap 12-tooth X-Sync pulley wheels Sealed cartridge bearings Aluminium Cage with Cage Lock X-Horizon design reduces shift force, ghost shifting X-Actuation maintains stability of shifting components Roller Bearing Clutch eradicates bounce