Eagle set the standard for wide range 1x, and the S200 derailleur is the workhorse that continues that legacyBackwards compatible, works with both 10-50t and 10-52t Eagle cassettesX-Actuation for use with Eagle Drivetrain shiftersType 3 clutch for confident and quiet descendingS20012sp5242Long1to1BLKUPC/EAN/GTIN: 710845928680