Legends touring specific spring rates produce superior ride quality and performance. REVO coils provide improved plush ride quality, control, and resistance to bottoming-out. REVOs extended coil length has larger sweet spot without increasing overall shock length. REVOs 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. All the benefits of the new REVO shocks above 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. Light to heavy riders can fine-tune ride preference. Aggressive to casual riding styles can tune to desired quality or personal preference. Backed by Lifetime Warranty. Made by hand in Sturgis, South Dakota, USa. NOTE: Heavy Duty applications are recommended for 500lb. + rider and passenger total weight.