Not all riders have the same inseam length, so to personally fit the motorcycle to your body requirements or riding style, you need these Adjustable Length rear Shock Absorbers.  "On the bike" adjustments allow for plus or minus 1 inch of seat height.  Unlike any other brand of shocks on the market today, they can be lowered or raised without losing any wheel travel.  This helps to keep the rear wheel on the ground over extreme bumps and is accomplished by their shorter shock body length. The precision manufacturing techniques used allows for high tolerance and concise valving.  To help prevent high temperature shock fade, a nitrogen  filled gas chamber has also been incorporated into each shock. Mounting eyelets include urethane bushings with steel inserts.  Fits Softail 1989/1999.  Also fits all HARDBODY Softail style frames.