Overview
- The California Energy Commission unanimously adopted the Replacement Tire Efficiency Program on Monday, Aug. 17, 2026, and set phased limits that start in 2029 and become stricter in 2033.
- The regulation requires most replacement passenger and light‑truck tires sold in California to meet rolling‑resistance caps and a wet‑grip minimum, and it mandates manufacturer testing, certification and a public CEC compliance database.
- The CEC models annual benefits of nearly $1 billion in fuel savings and about 2.0 million metric tons of CO2 avoided, and estimates the average cost rise at about $1.50 per tire in Phase 1 and $6.50 per tire in Phase 2 with a short payback for consumers.
- Industry groups, major manufacturers and independent retailers warn the rules could raise retail prices, remove many current models from California shelves and pressure performance or durability traits, and protesters and commentators have signaled possible legal challenges.
- The rule includes explicit exemptions for specialty tires such as motorsports, many winter and off‑road types, and temporary spares, and its enforcement powers and California’s market size mean the standards could influence other states or prompt further regulatory and legal fights.