APEX 5321123 Helper Assist Arm Assembly for AT26APEX 5321123Helper Assist Arm Assembly for AT26 For Use With AT26 Swing Arm Tire Changer Modern tires are heavier, stiffer, and less forgiving than ever. This Helper Assist Arm Assembly is designed for use with the APEX AT26 Swing Arm Tire Changer. The assist system stabilizes the tire, holds beads in the drop center, and provides controlled leverage during mounting and demounting. This dramatically reduces technician effort while improving safety,