The RAP (Remote Adjustable Preload) system allows for easy tuning of the shocks to account for changing loads or the addition of a passenger and is conveniently located behind the left passenger peg. Simply turn the knob in either direction to set the spring pre-load so you can tune your suspension to match your riding style. A pair of progressive-rate coil springs and purpose-designed mono-tube dampers provide superior suspension performance. Dampers feature a nitrogen charge that eliminates internal oil cavitation and helps create a consistent ride while resisting heat-induced fade.