When sourcing tires, you must prioritize Load Index and Speed Ratings to ensure they match the intended vehicle application. For passenger tires, look for UTQG (Uniform Tire Quality Grading) ratings covering treadwear, traction, and temperature. For commercial truck tires (TBR), focus on casing durability and retreadability, as high-quality casings significantly lower the Total Cost of Ownership (TCO). Additionally, verify the Rolling Resistance Coefficient (RRC); lower RRC tires improve fuel efficiency, which is a major selling point for fleet buyers.