This document outlines the Special Packaging Instructions (SPI) for tire and wheel assemblies (T&WA) used by the U.S. Department of Defense. The instructions are crucial for ensuring proper handling, preservation, and shipping of these assemblies, applicable to new, repaired, and unserviceable items. Key details include specific preservation methods compliant with military standards (MIL-STD-2073-1) and packing requirements to prevent damage during transport. It emphasizes appropriate materials for packaging, such as fiberboard separators and specific pallet designs, along with safety precautions during inflation/deflation processes. The SPI categorizes packaging levels (A and B), indicating that vertical and horizontal positioning of T&WA must ensure no overhang occurs, with mandatory protective measures like shrink-wrapping and fiberboard sheets in place. Special markings are required to alert handlers to potential hazards, especially with split rim assemblies. The document integrates regulatory compliance, safety protocols, and durability considerations, underlining the military's commitment to secure and efficient logistics in equipment management.