Have you always wanted to swathe your beloved bike in SRAM'S incredible XX1 1x11 drivetrain technology? You're in for a treat! With SRAM'S X01 1x11 drivetrain line, you can grace your bike with the benefits of single-ring living without the sheer XX price tag. The SRAM X01 11 Speed Rear Derailleur features a horizontal parallelogram design, X-HORIZON that keeps the chain gap the same across all 11 gears. The absence of vertical movement enables faster shifting, reduced shift force, and zero ghost shifting. The roller bearing clutch technology reduces bounce and chain slap, while the cage lock technology makes wheel removal and installation quicker and easier. The SRAM X01 X-Horizon Rear Derailleur combines the best features of the popular XX1 line with the current X0 line, to channel you into the simply efficient world of the single-ring, while offering the same lightweight, durable, and smooth shifting rear derailleur that X0 has gained a reputation for.