A cushion tire has a hollow center section that provides limited shock absorption without an air chamber, while a true solid tire is fully rubber throughout. Both are non-pneumatic and classified together under this heading, but the internal construction affects load ratings and application suitability. Providing the manufacturer's cross-section diagram and durometer rating to your customs broker helps ensure accurate classification.

Interchangeable treads and tire flaps are included within this SITC heading alongside solid and cushion tires, but at the HTS level they may be classified under distinct subheadings with different duty rates. Importers should verify the specific HTS subheading for replacement treads versus complete tires, as the distinction can affect both duty liability and any applicable trade-remedy exposure.