The SRAM SX Eagle 12 Speed Long Rear Derailleur is specialized for bikers looking to personalize and upgrade their rides for consistent precise shifting. The consistency comes from SRAM 1x, X-ACTUATION technology which works across the entire cassette. It features X-HORIZON™ tech making ghost shifting a thing of the past, as well as a large upper pulley offset which helps maintain chain gap across all gears. CAGE LOCK tech is included which helps makes removing the wheel and installing it easier and faster thanks to a simple push of the cage forward. It can accommodate 11-50T and 10-50T cassettes making it versatile with all your biking needs. The SRAM SX Eagle 12 Speed Long Rear Derailleur is your gateway for custom-fit rides that meet all your expectations.