Tariffs are published; the barriers that actually stop tire shipments often are not. Type approval regimes, mandatory national standards, conformity certificates, plant registration requirements, labelling rules, import licenses and localization expectations form a thicket that differs in every market - ECE regulations across dozens of contracting states, FMVSS in the United States, CCC in China, BIS in India, INMETRO in Brazil, GCC marks in the Gulf, and a growing list of national schemes elsewhere. Radial Insights, the world's number one tire consulting firm, converts this thicket into a navigable map with costs, timelines and sequencing attached.