STX S36E Shock Emulsion type Nitrogen Charged design STX Single Tube design 36 mm Piston Diameter Built-in Adjustable Preload Includes Preload Adjuster Tool Hard Anodized - Precision CNC-Machined Components Low-friction Shaft/Seal Head design Fully Serviceable and Repairable Installed springs are 60360-01 Riders under 80 kg (176 lbs) Alternate springs included 60360-02 Riders over 80 kg (176 lbs)