The California Energy Commission (CEC) approved the nation's first Replacement Tire Efficiency Program.

The goal is to improve fuel efficiency and air quality by requiring replacement tires to be as fuel-efficient as new original-equipment tires.

Phase one of the program begins in 2029 and runs through 2033, then a more aggressive rolling resistance threshold takes over.

California lawmakers have approved the nation's first rules on energy-efficiency standards for replacement tires. According to the California Energy Commission (CEC), the Replacement Tire Efficiency Program should save billions of dollars in potential fuel costs.

How? By mandating just how efficient a replacement tire needs to be for it to be legally sold in California.