Rubicon's 2.5" Extreme-Duty Monotube Shocks are developed and tuned specifically for each application. This is the only way to deliver maximum control while not compromising ride quality, high-speed stability and comfort for those extended trips over the toughest terrain. 2.5" body outer diameter with full bore piston to maximize damping capability is tuned specific to Rubicon Express spring rates to maximize ride quality and suspension travel. The shocks include a hydraulic rebound cut off to eliminate harsh top-out. Shocks feature 6061-t6 billet aluminum black anodized components and a 7/8" od hardened chrome shaft for increased durability and strength. The non-reservoir floating piston separates nitrogen and oil to eliminate cavitation and a wiper seal to prevent contamination. A durable powder coat finish allows for years of protection. Shocks are backed by Rubicon Express' advantage lifetime warranty.