The 7-speed X-HORIZON™ rear derailleur makes shifting smooth and reliable no matter where you ride.

Thanks to its "horizontal parallelogram" design, X-HORIZON™ can keep the chain gap the same across all 11 gears.

Every detail of the 11-speed X1 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.