SRAM "Force 1" 11-speed rear derailleur, X-Horizon, Type 3. The cage is made of aluminum. Roller Bearing Clutch technology regulates chain tension. Cage Lock for securing the cage for easy wheel changes. Thanks to the Cage Lock technology in the derailleur, removing and installing the rear wheel as well as chain installation is faster and easier than ever. Simply push the cage forward to release the chain tension and lock it in place. Intended use: Road. Compatibility: 11-speed. Mounting type: Frame mount. Material type: Aluminum. Number of speeds: 11-speed derailleur cage. Design: Medium length. Derailleur capacity: Normal. Max. largest sprocket: 36 teeth