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. FEATURES: 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 cog With CAGE LOCK™ technology in the rear derailleur, wheel removal and installation—as well as chain installation—becomes faster and simpler. Just push the cage forward to create slack and lock it into place. SPECS: Weight: 314g Colors: Black Outer Cage: Steel Compatibility: 10-speed and 11-speed SRAM 1x™ road systems Inner Cage: Steel Cage Sizes: Long Max Tooth: 42t Pulleys: Sealed cartridge bearings Pull: EXACT ACTUATION™