Advent Chain Aligner and Anti-Chainsuck Device SilverAdvent Chain Aligner and Anti-Chainsuck Device is a very innovative way to protect your drivetrain and frame from potentially serious chain suck. Twin plates positioned at the bottom bracket shell are adjustable and will fit most any metal bike frame. Protects by deflecting chain before it strikes frame and becomes crushed. Attaches using included hardware.037913284265
