Legend Suspension Revo-A Heavy-Duty Shocks For Harley Dyna Features: Provide improved plush ride quality, control, and resistance to bottoming-out Extended coil length has larger sweet spot without increasing overall shock length Unique spring rate offers the ability to soften pre-load, reducing ride height and maintaining a smooth ride Allows minimal pre-load adjustments when changing between riders' weights or loads Adjusts by hand, no tools needed Easy installation and alignment, provided by spherical bearings on both top and bottom Great air suspension for your motorcycle All the benefits of Revo shocks plus six external knob adjustments allow fine-tuning of rebound Provides optimum rebound performance for any given rider weight, personal ride quality preference, or personal riding style Lifetime warranty Made by hand in Sturgis, South Dakota