Dirt Logic 2.25 Resi Shock. Dirt Logic 2.25's are designed to replace factory shocks with a larger, more robust configuration. The 2.25 size is what separates it from other replacement take apart shocks for a superior ride, both on and off road. Shocks are pretuned for each Fabtech suspension, accounting for larger tires, providing the finest all around damping. Features 2.25in OD Stainless Steel Body. 2.0in OD Billet Aluminum Piston. 78in NitroSteel BlackPiston Rod. Polyurethane Mounting Ends. 2.25in OD Aluminum Reservoir w - 6 Stainless Steel O - ring Hose. Extended Length - E29.78. Collasped Length - C18.99. Stroke Length - S10.79. Top Mount - EB1. Bottom Mount - EB1.