SRAM Rival 1 Type 3.0 Rear Derailleur 11spThe SRAM Rival 1 rear derailleur is engineered for smooth, reliable shifting action, delivering 100% of what you demand. By eliminating unwanted chain movement, X HORIZON shifts faster, reducing shift effort and chain slap. X HORIZON design reduces shift force while eliminating ghost shifting and chain slap Large upper pulley offset automatically adjusts chain gap Sealed cartridge bearings and aluminum cage Technologies: X HORIZON, EXACT ACTUATION, X