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. 7/8in NitroSteel BlackPiston Rod. Polyurethane Mounting Ends. 2.25in OD Aluminum Reservoir w/-6 Stainless Steel O-ring Hose. Extended Length – E23.03. Collasped Length – C15.37. Stroke Length – S7.66. Top Mount – S38. Bottom Mount – EB1.