Apex derailleurs share all the compatibilty and many of the featrues of higher priced options.

• The 1x specific X-Horizon derailleur design has arrived at the affordable Apex level
• Roller bearing clutch and parallelogram design combine to minimize chain bounce, making the drive train safer and quieter over rough terrain
• Not compatible with multiple chainring drive trains
• Pulleys have sealed cartridge bearings
• Aluminum cage and parallelogram

SRAM Apex Rear Derailleur Rear Derailleur UPC: 710845783203