Oneup components radr shimano rear derailleur cagethis 2nd generation rad cage is specifically designed for saint and zee but works well with all shimano shadow clutch rear derailleurs dramatically improves shifting performance on any extended range shimano 1x10 drivetrain the key feature of the oneup radr radial appositioned derailleur cage is that the upper pulley wheel has been moved rearward of the cage pivot to optimise the derailleur for larger sprockets now as the derailleur moves