The SRAM X.9 Front Derailleur is the perfect complement to the rest of your drivetrain. SRAM's EA (Exact Actuation) technology finds the perfect balance between cable tension, tight cog spacing and rear derailleur design, which results in confident, reliable shifting, even under load. The X9 also utilizes SRAM's X-Glide technology, which is designed to grab the outer chain link at any of four different positions on the cog to provide instantaneous shifts.