Progressive Harley Ultra Touring-QPS 944 Series Shocks, 13in, 12in Ride Height Heavy Duty - Black /The Progressive Suspension 944 Ultra Low with the Quik Preload System (QPS) makes adjusting the preload on PS 944 Series shocks easier than ever before. With QPS, it's no longer necessary to take saddlebags off to adjust the sag when going from a single rider, to a two up riding configuration, and then back to a solo riding experience. This means the suspension can be set up for changes in weight load in less than a minute, couple this with the