The SRAM X1 11 Speed X Horizon Type 2.1 Derailleur offers unbelievably smooth shifting thanks to technology that SRAM has been developing over the past few years

Designed for an 11-speed drivetrain, the SRAM X1 11 Speed X Horizon Type 2.1 Derailleur provides fast, accurate shifts even under load. By limiting all movement to the horizontal axis, the new design of the SRAM X1 11-Speed X-Horizon Type 2.1 Rear Derailleur reduces shift force and eliminates ghost shifting. Chain slap is no longer an issue thanks to SRAM's roller bearing clutch technology. A large 12-tooth upper pulley wheels is offset and automatically adjusts chain gap for efficient shifting no matter the terrain. The rear derailleur is also quiet thanks to a "silent" pulley tooth design. When paired with the SRAM XX1 shifter, the X-Horizon Rear Derailleur shifts even smoother!