CBP typically relies on the tire's load index, ply rating, speed rating, and the vehicle-type designation molded into the sidewall. A tire engineered and labeled for commercial vehicle use — even if its rim diameter is similar to a large passenger tire — will generally be classified as a bus/truck tire. Manufacturer technical documentation and the sidewall markings are the primary evidence.

Antidumping and countervailing duty orders have been applied to bus and truck tires from several countries. Importers should conduct a scope analysis against current orders, verify the producer's individual duty rate if applicable, and post any required cash deposits before entry. A licensed customs broker or trade attorney can assist with scope rulings if the product's classification under an existing order is uncertain.