REVO coils provide improved plush ride quality, control, and resistance to bottoming-out. Their extended coil length has larger "sweet spot" without increasing overall shock length and the 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 Available in 12", 13", and 14", standard or heavy-duty applications Easy installation and alignment, provided by spherical bearings on both top and bottom Backed by lifetime warranty