Based on 10-years of experience with Eagle drivetrain, Eagle S100 delivers a modernized derailleur with improved bushing fitment process for long term durability and precision. Eagle is a promise of accurate and purposeful shifting, and S100 delivers a high performing, 500% range derailleur built to excel in high-torque use, in all conditions, for all riders.Features- Mounting bolt is Half Mount ready. Pair with a UDH and Half Mount plate for increased derailleur hanger security- Utilizes proven Drag Spring cage damper for confident chain retention- Max 500-percent range for pairing with PG1210 cassette- X-Actuation for use with Eagle Drivetrain shifters