Arnott's new adjustable Ultimate Ride Air Suspension Kit for 2018-2021 Harley-Davidson Softail/FXDR offers TruAIR Technology with a rugged Goodyear multi-ply air spring sleeve which is coupled with a custom FOX nitrogen-charged, monotube shock absorber. Arnott's Air Shock provides the rider with superior control, ride comfort and much greater height adjustability. Arnott pairs your shock with a small but powerful compressor, application-specific mounting bracket, and air distribution valve block which includes a muffler to control how fast air is released. Each kit includes everything you need for a fast and flawless installation including an installation manual, fused wiring harness and relay assembly, chrome/black handlebar-mounted inflation switch, all necessary tubing, wiring, cable ties, fittings, and mounting accessories. Each shock is custom-crafted and rigorously tested in Arnott's Florida manufacturing facility and is backed by Arnott's Limited Lifetime Warranty. ELEVATE YOUR RIDE.