The FOX RC-1 rear shocks give you the comfort and control needed to get the most out of your Harley Sportster. With an external reservoir housing an internal floating piston to separate the nitrogen gas from the shock oil, the RC-1 shocks will maintain damping control no matter how long you ride. The 24-position compression adjustment on the reservoir allows you to fine tune the exact damping to support the rear wheel without a harsh ride. In addition, the RC-1's wide-range rebound control with 12 distinct clicks allows you to tune the exact rebound rate to balance out your spring preload and keep your rear wheel firmly planted on the road. Adjustable preload, wide range rebound and low speed compression Aluminum piggyback reservoir 24-position adjustable compression 12-position adjustable rebound 1-1/2" 6061-T6 aluminum type III hard anodized body Advanced high-flow, deflective disc velocity-sensitive damping Gas-charged mono-tube with internal floating piston (IFP) Fully rebuildable and revalveable Advanced high-flow, deflective disk, velocity-sensitive damping 5/8" low friction, super-finished hard chrome shaft Laser-etched FOX logos Optional "Blackout" reservoir decal included