Ohlins STX Performance Rear Shock For Harley Softail With Remote Preload If you have a built motor on stock suspension, you won't be able to put that extra power to the ground. Fortunately, Ohlins has you covered with their fully adjustable, high-performance rear shock for your Softail. The S46 rear shock has been designed specifically for the M8 Softail platform and offers a large 46mm main piston, an internal gas reservoir hidden inside the main body of the shock, length adjustability, and a hydraulic preload adjuster. With adjustable damping, you can change the behavior of the shock to suit your taste. The tool-free hydraulic preload knob allows you to make incremental adjustments completely separate from the mechanical preload on the spring, perfect for unexpected passengers! Features: Adjustable rebound damping Hose mounted hydraulic preload adjustment Monotube shock with internal reservoir STX Single Tube design 46mm piston diameter Adjustable preload Hard Anodized - precision CNC-machined components Low-friction shaft / seal head design Fully Serviceable and Repairable Spring Weights: Light Duty recommended for individual rider weighing under 180lbs Standard recommended for individual rider weighing 180lbs - 225lbs Heavy Duty recommended for individual rider weighing over 250lbs Notes: For models without a remote preload adjustment on the side cover. Low Rider ST and Heritage use 13 1/2 shocks for stock ride height, all others use 12 1/2.