Fox Racing Preload Adjustable 12" Shock 1984-2016 Harley Touring 897-27000Model specific optimized ride tune Gas charged mono tube, with internal floating piston 1. 5 6061 T6 aluminum type III hard anodized body Fully serviceable and rebuildable Advanced high flow, deflective disk, velocity sensitive damping Hand adjustable spring preload 1 2" low friction, super finished hard chrome shaft Carbon Black spring available with standard or heavy duty spring rates Machine cut aluminum billet preload adjuster and spring seat