California is considering the "Replacement Tire Efficiency Program," a proposal that would require aftermarket tires sold in the state to meet the same efficiency standards as original equipment tires. Spearheaded by the California Energy Commission (CEC), the initiative aims to boost fuel economy and reduce emissions statewide. However, this could significantly restrict consumer choice in the aftermarket, potentially limiting options for specialized tires and increasing costs. The industry and consumers are evaluating the proposal's implications on performance, safety, and market diversity, raising questions about a one-size-fits-all approach to tire regulation.