SRAM Rival 1 - 11 Speed Rear Derailleur - SilverSRAM Rival 1 11 Speed Rear Derailleur Silver Your needs aren't less demanding, they're different. The 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. The SRAM Rival 1 rear derailleur is engineered for smooth, reliable shifting action from the larger upper pulley offset to the 12