Ifp-qsr Shocks Dyna 13.5" Std Rebound AdjustModel specific optimized ride tune Available in gas charged mono tube or remote reservoir versions both 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 IFP QSR shocks feature 3 position adjustable rebound Laser etched FOX