sram gx 1x11 x-horizon rear derailleur in black

The SRAM GX X-HORIZON™ rear derailleur is engineered for smooth, reliable shifting action-from the larger upper pulley offset to the 12-tooth X-SYNC™ pulley wheels. By eliminating unwanted chain movement, X-HORIZON™ shifts faster, puts an end to ghost shifting and reduces shift force and chain slap. And with CAGE LOCK™ technology, wheel removal and installation are easier than everFeatures:X-HORIZON™ design reduces shift force, ghost shifting and cage slap12-tooth X-SYNC™ pulley wheelsLarge upper pulley offset automatically adjusts chain gapSealed cartridge bearingsAluminum cageSpecifications:SPEED (RD) - 11sCABLE PULL RATIO - X-actuationCAGE (RD) - LongMAX TOOTH - 42COLOR (RD) - Black, RedPULLEY BEARINGS MATERIAL - SteelCAGE MATERIAL (RD) - AluminumWEIGHT (G) - 265WEIGHT BASED ON - RD 1x11 Long Cage Black