California introduces tire fuel efficiency requirements
The California Energy Commission (CEC) has officially approved the first energy efficiency requirements in the United States for passenger car and light truck tires sold in the replacement market.
“Tires originally equipped on new vehicles are typically optimized for fuel economy. In contrast, replacement market tires are often less energy-efficient and increase fuel or electricity consumption,” the CEC stated. “The new standards are designed to ensure that the average fuel efficiency of replacement tires will be at least as high as that of tires installed on new vehicles.”
The commission added that the new requirements are expected to save California drivers nearly $1 billion annually and reduce CO₂ emissions by 2 million tons per year—“equivalent to removing approximately 400,000 gasoline-powered vehicles from the state’s roads.”
According to CEC data, additional consumer costs will be “very minimal”—$1.50 per tire in the first phase (2029–2033) and $6.50 per tire in the second phase (after 2033). However, drivers are expected to save around $179 per tire set over its lifetime—“seven times exceeding the additional costs.” The calculations were based on a gasoline price of $4.60 per gallon, with savings potentially 25% higher if fuel prices rise.
“Replacement tires already meeting the new standards are currently available,” emphasized the CEC. “These tires are popular, safe, durable, competitively priced, and produced by a wide range of manufacturers. Additionally, companies will have several years to refine their tires that currently do not meet the requirements, which will fully take effect in 2033.”
Prior to establishing the new standards, the commission reportedly conducted extensive laboratory tests on the most popular replacement tires in California and reviewed data from leading industry players such as Discount Tire. “The analysis confirmed that implementing the new requirements is both feasible and economically beneficial, with no negative impacts on tire lifespan, safety, or other factors,” the CEC added.
The new standards were discussed over five years with industry stakeholders, including manufacturers and trade associations. As a result, the requirements will not apply to certain specialized products such as motorsport tires, large off-road vehicles, and all-weather tires with enhanced winter performance. Additionally, separate categories have been established for long-life tires, UHP models, tires with low load index, and others.
“During the implementation of the standard, the CEC will continue collaborating with stakeholders to ensure its fair and effective application,” the commission concluded.
In April 2026, concerns about the new requirements were expressed in a letter to the CEC by Yokohama, Goodyear, the California Tire Dealers Association (CTDA), and three other trade associations, which noted that “tires meeting the required rolling resistance… typically cost hundreds of dollars more per set compared to basic alternatives.”
The letter also stated that “California is currently experiencing a housing affordability crisis,” and the new standards would impose an additional financial burden on residents by “adding hundreds of dollars in extra costs.”
“California consumers have access to a wide variety of tires differing in price, durability, noise, grip, and fuel efficiency,” industry representatives pointed out. “Many drivers are willing to pay more for low rolling resistance tires if their performance matches their preferences and budget. Other motorists prioritize tire longevity, grip, or affordability. The new standards, however, remove consumer choice by setting a single energy efficiency benchmark for the entire market, regardless of drivers’ preferences, driving styles, or purchasing power. This approach is particularly problematic given the associated costs.”
The Tire Industry Association (TIA) stated it “continues to have serious concerns regarding the potential impacts of the new regulations on dealers and consumers.”
Roy Littlefield, TIA’s Vice President of Government Affairs, noted that the association has worked for years to ensure dealer interests are considered in the development of the new standards. “We’ve achieved several important wins for California tire retailers,” he said. “Most significantly, employee training requirements have been eliminated, substantially reducing the burden on dealers. TIA also succeeded in ensuring the requirements apply only to the sale of new tires.”
“Although TIA has serious concerns about the new regulations and their potential impact on the industry, we will continue to advocate for dealer interests as the program moves forward,” he added.
Concerns were also raised by the U.S. Tire Manufacturers Association (USTMA), which noted that “serious concerns remain, including how compliance with the new standards will be monitored and how fair competition will be ensured.” “We strongly urge the CEC to resolve these issues before the new requirements take effect,” USTMA added.
Dunlop Tires North America (DTNA) also released a statement on the new regulations, acknowledging the importance of efforts to reduce tire rolling resistance and improve vehicle energy efficiency.
“We do not deny the importance of these goals, nor do we oppose responsible efforts to improve the energy efficiency of our industry’s products,” said the company, part of Sumitomo Rubber Industries, while adding that “although environmental impact is significant, we are concerned that the new rules do not fully recognize that tires are not designed to optimize a single performance characteristic.”
DTNA emphasized that tires are engineered to balance rolling resistance, grip, tread life, handling, load capacity, all-weather suitability, comfort, noise, and cost. Therefore, “California authorities must be cautious not to improve one parameter at the expense of others, as well as tire affordability and the consumer choice they expect. The goal should not simply be reducing rolling resistance, but improving environmental outcomes without significant negative consequences for consumers.”
The company also highlighted differences between OE and replacement market tires. “OE tires are developed in close collaboration with automakers for specific vehicles,” DTNA noted. “They are designed according to a defined set of requirements established during vehicle development—such as ride comfort, noise, handling, braking, weight, durability, and rolling resistance. Additionally, automakers’ obligations and goals under federal CAFE standards, which regulate average fuel economy across a manufacturer’s vehicle fleet, are taken into account. Thus, rolling resistance can be highly prioritized in OE tire development, as reducing it improves vehicle energy efficiency and helps automakers meet fuel economy regulations. This means that, to some extent, government policy priorities take precedence over optimizing tires for consumers or the actual conditions in which vehicles will ultimately be driven. This is a key distinction for this category of tires.”
In the replacement market, the company added, consumers may prioritize tread life, wet or winter grip, off-road performance, comfort, price, or cost per kilometer. Additionally, tire usage conditions can vary significantly—tires in California may be used in coastal heat as well as mountain snow.
“It is essential to preserve the ability to choose tires suitable for different vehicles, applications, buyer budgets, and environmental conditions,” DTNA stated. “An OE tire is designed to meet requirements—including fuel economy—set for a new vehicle, while a replacement tire must meet the real-world needs of the driver.”
The manufacturer also noted that while reducing rolling resistance lowers fuel or electricity consumption, “this is only part of the equation.” “If a tire is more expensive, wears out faster, or is less suitable for a specific application, the expected economic benefit from improved energy efficiency may be reduced or eliminated,” the company said. “Tire lifespan also affects the environment, and we believe the analysis should cover the entire product lifecycle—from production to recycling. California already generates a large number of used tires, and any policy that could shorten tire life must consider its potential impact on the recycling industry.”
DTNA emphasized that “rolling resistance cannot be evaluated independently of safety.” “Tire development and testing require significant effort and investment,” the company noted. “Manufacturers must balance fuel efficiency, grip, durability, handling, and price across hundreds of tire sizes and applications, and this complexity must be considered when setting new requirements. Standards that are difficult to meet across a broad product range could reduce the number of manufacturers and available tires, especially among smaller and specialized suppliers. A healthy replacement market benefits consumers through greater choice, competitive pricing, and continuous product investment. Moreover, many independent dealers, tuning companies, and others depend on the industry, and reduced tire availability could affect more than just manufacturers and retailers.”
DTNA also pointed out that fuel consumption can be reduced through proper tire use. “Correct tire pressure is critical for performance and efficiency, and modern vehicles already come equipped with tire pressure monitoring systems,” the company said, adding that “improving tire pressure maintenance over the tire’s lifespan can significantly enhance energy efficiency without unnecessary restrictions on tire choice.”
“DTNA supports efforts to reduce environmental impact and improve tire energy efficiency. However, we believe California authorities must assess all consequences of the new regulations,” the company stated. “Consumers must retain access to tires suitable for their vehicles, region, budget, and intended use. Realistic timelines must be set to allow manufacturers time to develop and test necessary products. Competition must remain strong, safety must remain the top priority, and parameters beyond rolling resistance must be considered. We recommend continued collaboration between California authorities, manufacturers, dealers, and the automotive industry as a whole to advance environmental progress without significant negative impacts on consumer choice and competition.”
The CEC received support from Michelin, and Francesca Mosteller, Director of Government Affairs for the company’s North American division, noted that the new requirements “align with Michelin’s approach of reducing tire environmental impact across the entire product lifecycle without compromising safety or other consumer-critical performance aspects.”
“We support the initiative to improve tire energy efficiency and believe compliance with the new requirements is technically feasible within the established timelines,” she added.
Bridgestone also stated its support for California’s environmental protection program and added, “the company is working with the California Energy Commission to ensure customers continue to have access to tires offering the highest levels of safety and fuel efficiency.”
Photo: MTD