California Approves First Nationwide Replacement Tire Efficiency Regulations
California's Energy Commission has adopted the Replacement Tire Efficiency Program, with the initial phase set to begin in 2029 and a stricter phase slated for 2033, aiming to cut driver costs and lower emissions.
California officials announced Monday that the state’s Energy Commission has formally adopted the Replacement Tire Efficiency Program, the nation’s first set of rules governing aftermarket replacement tires. The regulations, which emerged after a public comment period and subsequent revisions, allow exemptions for high-performance competition tires, off-road tires, and all-season winter performance tires, among others.
The program drew both support and criticism during the comment phase. Tire manufacturers Michelin and Bridgestone backed the initiative, emphasizing the need to balance safety with efficiency gains. Dunlop issued a measured response, stating that California should "evaluate the complete consequences of replacement tire requirements" and continue collaborating with tiremakers, consumers, and the auto industry to achieve environmental benefits without harming consumer choice, competition, or trade.
The Specialty Equipment Market Association (SEMA) remained opposed, citing concerns about tire affordability, consumer choice, and impacts on small businesses, though it acknowledged that the final proposal "is significantly improved from where the rulemaking began."
CEC commissioners approved the standards unanimously. Regulators estimate the measures will save drivers nearly $1 billion and reduce CO₂ emissions by about 2 million metric tons annually. The first phase of the rules will take effect in 2029, with a more stringent set of requirements scheduled for 2033.