California’s effort to create the nation’s first replacement tire efficiency standards is moving closer to adoption, but the proposal continues to divide environmental advocates, tire manufacturers, retailers, and automotive enthusiasts.
The California Energy Commission’s (CEC) proposed Replacement Tire Efficiency Program, stemming from Assembly Bill 844, would establish minimum performance standards for replacement tires sold in California based largely on rolling resistance, a measurement tied to fuel economy and vehicle efficiency. The CEC says the regulation could reduce gasoline consumption by 141 million gallons annually, cut greenhouse gas emissions by roughly 2 million metric tons per year, and generate nearly $1 billion in annual fuel savings once fully implemented.
Following a public hearing in June, the CEC released a revised proposal on July 17 that delays implementation and expands exemptions. Phase 1 standards would now apply to tires manufactured on or after Jan. 1, 2029, while stricter Phase 2 requirements would take effect in 2033.
Industry Support and Skepticism
Some tire manufacturers, including Michelin, have expressed support for the proposal. Russell Shepherd, Director of Technical Communications for Michelin North America, told regulators that, “Michelin has products on the market today that meet or exceed California’s proposed thresholds while delivering outstanding wear life and other performances.”
ENSO, an EV-focused tire manufacturer, also backed the proposal. CEO Gunnlaugur Erlendsson said efficient tire technology is already widely available in overseas markets and challenged claims that compliance would be prohibitively expensive. “If a small, independent tire company can deliver this profitably to the market, the world’s largest tire makers can definitely do the same,” Erlendsson said.
Others raised concerns.
Continental Tire questioned how the state would verify compliance across thousands of tire models and warned that some specialty products could disappear from the market. The U.S. Tire Manufacturers Association urged regulators to revise portions of the proposal, citing concerns about performance trade-offs and testing requirements.
Retailers and Enthusiasts Raise Concerns
One of the most notable comments came from America’s Tire, which operates 151 stores in California.
America’s Tire (Discount Tire) supports the state’s efficiency goals but warned that the proposal could dramatically reshape the marketplace. “If the Phase 2 requirements beginning in 2031 were applied to the tires we sell in California today, roughly 70% of currently available options would be removed from the market,” said John Baldwin, Chief Product & Technical Strategist for America’s Tire. Baldwin emphasized that affordability and product availability must remain top priorities, as tires are not a discretionary purchase for most consumers.
Automotive enthusiasts echoed similar concerns, arguing that drivers should be free to prioritize grip, handling, and performance over maximum fuel economy. Several speakers warned that track-day and motorsports tires could be affected.
CEC Revises Plan After Hearing Feedback
The revised proposal includes several changes that appear to address concerns raised during the public comment process.
The CEC added an exemption for competition tires, created new categories for all-season winter performance tires, run-flat tires, and large off-road tires, and expanded certain exemptions for specialty applications. The agency also extended the compliance timeline to give manufacturers more time to prepare.
These changes were welcomed by some enthusiasts and industry stakeholders who argued that the original proposal was too broad.
Environmental Groups Rally Behind Proposal
Environmental and consumer advocates largely support the rule.
Organizations, including the Consumer Federation of America, NRDC, Coalition for Clean Air, Environment California, and the Union of Concerned Scientists, argued that the proposal would save consumers money while reducing transportation-related emissions. Supporters also praised the creation of a tire-rating database that would help shoppers identify more efficient replacement tires.
Why It Matters Beyond California
Although the regulation would apply only to California, its impact could extend nationwide.
California is the largest automotive market in the country and has historically led the way on vehicle emissions and environmental regulations. Manufacturers often choose to comply with California standards nationwide rather than maintain separate product lines for different markets, meaning a California tire rule could eventually influence replacement tire offerings and tire-development priorities across the United States.
What’s Next?
The CEC is currently accepting comments on the revised proposal through Aug. 3. After reviewing the feedback, the commissioners could consider adopting the regulation at a future business meeting. The central question remains whether California can improve tire efficiency without significantly increasing costs or limiting the tire choices available to consumers.
Want to boost fuel economy regardless of California’s proposed tire rule? Properly inflated tires reduce rolling resistance and can improve efficiency, so check out Kelley Blue Book’s guide on how tire pressure affects fuel economy.
