CURT Replacement ActiveLink Under-Arm Bike Rack Rubber Frame Cushion Model 19249CURT Replacement ActiveLink Under Arm Bike Rack Rubber Frame Cushion Model 19249 This replacement rubber frame cushion is designed to fit CURT under arm style ActiveLink bicycle carrier #18412. It is designed to securely hold the bicycle frame onto the ActiveLink bike carrier, and the soft, flexible rubber material prevents scuffs and scratches while allowing various bike styles and frame sizes to be mounted securely. Replacement rubber bumper pad