SRAM's Apex 1 drivetrain provides the gear range and the shifting simplicity to let you simply go where you want. The Apex 1 rear derailleur makes that gearing choice a reality with clean, crisp shifts, thanks to SRAM's X-Horizon™ geometry and our Roller Bearing Clutch™. X-HORIZON™ design reduces shift force, eliminates ghost shifting and chain slap Compatible with 10-speed and 11-speed SRAM 1x™ road systems. With CAGE LOCK™ technology, wheel removal and installation are easier than ever Equipped with Roller Bearing Clutch™ Large upper pulley offset automatically adjusts chain gap Long cage fits up to a 42 tooth cogFeatures: Weight: 314gr Cage material: steel Compatibility: 10-speed and 11-speed SRAM 1x™ road systems Cage size: long Max tooth: 42t Pulleys: Sealed Cartridge Bearing Pull: EXACT ACTUATION™Reference: 00.7518.094.000 - Rear Derailleur Apex 1 Black Long Cage 11-Speed