Progressive Suspension was the first to introduce aftermarket shocks for the most popular frame design ever produced and we continue to refine our work. Two inches of ride height adjustment as well as adjustable for spring preload to accommodate varying loads and rider weights, all wrapped in a chrome shroud. Adjustable from stock to 2" lower Show Chrome Finish Standard and Heavy Duty Preload adjustable High pressure gas charged monotube for consistent damping performance 1 Year Warranty