California proposes stricter standards for replacement tires to reduce vehicle energy use

California regulators are evaluating a proposal that would require replacement tires to meet the same efficiency standards as the original‑equipment tires installed on new vehicles. The rule targets rolling‑resistance levels, aiming to lower fuel consumption for gasoline and diesel cars and to extend the driving range of electric vehicles.

Supporters argue that higher‑efficiency tires would cut energy use, reduce emissions and save drivers money on fuel or electricity over the life of the vehicle. Critics warn that tighter standards could raise manufacturing costs for tire makers, which may be passed on to consumers as higher prices and a reduced selection of inexpensive tires. The proposal is part of a broader California plan that already includes a ban on sales of new gasoline and diesel cars after 2035, and could influence tire‑manufacturing practices nationwide if adopted.