California approves first US energy-efficiency standards for replacement tires

The California Energy Commission has approved the nation’s first energy-efficiency standards for replacement tires. The regulations aim to ensure that replacement tires sold in the state meet minimum standards for “rolling resistance,” which can improve fuel economy for gasoline vehicles and extend the range of electric vehicles.

The mandate will be implemented in two phases. The first phase begins in 2029, targeting the most inefficient tires. The second, stricter phase begins in 2033. To assist consumers, the state will also establish a labeling system using a “leaf” rating to identify efficient options.

Economic and environmental projections suggest significant impacts. The commission estimates the changes could save Californians approximately $1 billion annually on refueling costs. While the first phase may increase the cost of a set of four tires by about $6, it is projected to save drivers roughly $85 in fuel over the tires' lifespan. The second phase is estimated to cost an additional $26 per set but could save approximately $179 in fuel. Additionally, the state projects the regulations could reduce carbon dioxide emissions by 2 million tons annually.