The SRAM Force CX1 Rear Derailleur adopts all the technologies of SRAM 1X MTB to provide the fastest, quietest 1x11 shifting available. SRAM's unique clutch system eliminates chain slack, providing for smoother, quieter, and more secure chain travel. A dedicated 1x rear derailleur. Exact Actuation for fast and accurate shifts using SRAM's 1:1 actuation ratio (shifter cable travel: derailleur movement). 10 and 11 speed compatible. X-SYNC pulley features a 12-tooth design that helps control the chain's lateral movement. X-HORIZON straight parallelogram design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift force.ROLLER BEARING CLUTCH's one-way roller clutch controls chain tension for consistent shifting. CAGE LOCK technology makes for fast wheel changes or chain installation. Weight: 261 g. Speeds: 11 (Exact ActuationÔäó) - 10sp compatible. Material: Aluminum Cage/Cartridge Bearing Pulleys/Stainless Harware. Color: Grey Anodized. Compatibility: SRAM 10- or 11-speed Exact Actuation Shifters/ Medium Cage: 11-26 through 11-32 / Short Cage 11-26 through 11-28Technology Highlight(s) X-HorizonÔäó/ Roller-Bearing Clutch/ Cage Lock/ X-Sync Pulleys/ Medium & Short Cages.