Intelligent Suspension (iS) allows the hull to move independently of the upper deck, isolating the rider and passenger from the impact of rough water with six inches of suspension travel. So you can ride longer, with greater comfort and control, through all types of conditions. The suspension comes factory-set for sport riding on the RXT iS 255 and readily adapts to fit changing conditions, number of passengers or personal preference. Choose one of nine settings or set it to auto calibration. And do it all on the move, using the rocker switch on the handlebar.