Full Breakdown
California Moves to Ban Inefficient Aftermarket Tires by 2035
8/21/2026, 3:50:03 AM
Core Event
California’s Energy Commission (California Energy Commission (CEC)) is preparing a rule that, if adopted, will require all replacement tires sold in the state after 2035 to meet the same rolling-resistance efficiency targets as the original-equipment (OEM) tires that come with new passenger cars and light-duty trucks. The regulation stems from Assembly Bill 844, passed by the state legislature 23 years ago, which tasked the CEC with creating a tire-efficiency program.
Background & Context
The agency’s staff report explains that rolling resistance—the ease with which a tire rolls—directly influences fuel consumption for gasoline, diesel, electric or hydrogen-fuel vehicles. The CEC argues that aligning aftermarket tires with OEM specifications will close the efficiency gap created when manufacturers tailor OEM tires for performance or fuel-saving purposes.
Projected Impacts
The CEC estimates that the rule would save each California driver of a gasoline passenger vehicle roughly $179 (2024 dollars) over a typical four-year tire set, translating to an annual statewide fuel-cost reduction of about $979 million in 2035. The same analysis projects a reduction of 2.0 million metric tons of CO2-equivalent that year—just under 2 % of the state’s total passenger-fleet emissions. The commission also plans exemptions for ultra-low-treadwear track tires, though high-performance summer tires may face compliance challenges.
Criticism & Opposition
Commentators in *Hot Rod* contend that the rule could shorten the service life of replacement tires, potentially dropping average mileage warranties to below 30,000 miles and prompting more frequent replacements. They argue that increased tire production could offset any fuel-cost savings and exacerbate environmental harm. The same critics warn that limiting aftermarket options may hurt motorsports enthusiasts and reduce consumer choice overall.
Official Statements & Responses
The CEC staff analysis maintains that the proposed regulations are technically feasible, cost-effective, and will not compromise safety, tire longevity, or waste generation. The agency also notes that the rule primarily affects drivers who obtain tires through dealership service departments, where compliance is easier to enforce and where dealers may benefit from higher margins on OEM replacements.
