California’s proposed new tire regulations

[CapriRacer]

On Friday, April 24, 2026, the California Energy Commission issued its proposed new tire regulations for tires sold in California. The new regulations would require passenger car and light truck tires to meet a maximum rolling resistance level which varies by tire category in 2 phases. The first phase is slated for January 1, 2028, and the second phase on January 1, 2031. The new regulations include a minimum wet grip level.

In addition to the tire requirements, tire manufacturers (or brand name owners) would be required to submit data to the CEC on all tires that meet the regulations. Data would include rolling resistance, wet grip level, and enough information to uniquely identify the tire. A database is planned to be available to the public.

I go into detail here:

Barry's Tire Tech: California’s Proposed Replacement Tire Efficiency Program – April, 2026

[redpoint5]

I normally hate this kind of thing, but then there should be a DB of tire specs people can reference.