DRAG SPECIALTIES SHOCKS SHOCKS 12ADJ BLK91-17FXD C16-0156ABNitrogen charged steel monotube damper bodies with hard chrome plated shafts, Dual rate progressive wound springs for a smooth, comfortable ride, Adjustable spring preload, Ride height adjustable, + 1 2" from size listed, Black shocks feature black springs and damper bodies with black end caps eyelets, Mount with existing hardware, Shocks shorter than OE length have reduced travel, this may affect the ride quality and handling of the motorcycle.,