California has approved the nation’s first efficiency standards for replacement tires, but the new rules do not ban the tires already on your vehicle, require an immediate replacement or create a new ticket for drivers.
The first requirements apply to covered replacement tires manufactured on or after January 1, 2029. Stricter efficiency limits begin with covered tires manufactured on or after January 1, 2033.
For the average driver, nothing changes today. When the program begins, tire manufacturers and retailers—not individual motorists—will be responsible for ensuring newly manufactured covered tires meet California’s rolling-resistance and wet-grip requirements.
The viral claim that California has simply “banned 70 percent of tires” strips away nearly every important detail. Some current tire models would not meet the future thresholds in their present form, but manufacturers have several years to redesign, replace or reclassify those products. Existing tires remain legal, and numerous specialty categories are excluded or receive different standards.
Here is what the California tire law actually does, when it starts and what drivers should expect.
California tire law 2029: the quick answer
- Nothing changes for drivers immediately.
- Tires already installed on vehicles are not banned.
- The first phase applies to covered tires manufactured on or after January 1, 2029.
- The stricter second phase begins with tires manufactured on or after January 1, 2033.
- The regulation controls tires sold or offered for sale in California—not private ownership of existing tires.
- Covered tires must meet rolling-resistance limits and generally achieve a wet-grip index of at least 1.0.
- Qualifying competition, winter, all-season winter-performance, motorcycle, off-road and other specialty tires receive exclusions.
- California estimates additional costs of $1.50 per tire in phase one and $6.50 per tire in phase two. Those figures are state projections, not guaranteed retail prices.
What California approved
On August 17, 2026, the California Energy Commission unanimously approved the Replacement Tire Efficiency Program. It establishes performance and reporting standards for replacement tires sold for passenger vehicles and light-duty trucks in California.
The program was authorized by Assembly Bill 844, which became law in 2003 and directed the CEC to ensure that replacement tires sold in California are at least as energy efficient, on average, as tires installed as original equipment on new passenger vehicles and light trucks.
According to the California Energy Commission’s official announcement, original-equipment tires generally provide lower rolling resistance than the average replacement tire. Replacing an efficient factory tire with a higher-resistance model can therefore reduce gasoline mileage or electric-vehicle range.
California is addressing that difference through limits on rolling resistance, a separate wet-braking requirement, manufacturer reporting and a public database of approved tires.
This is technically a regulation adopted under an existing California law—not a new prohibition directed at individual drivers. Calling it the California tire law is convenient for search purposes, but the actual program regulates the tires manufacturers, brand owners and retailers place into the California replacement market.
When do California’s new tire rules start?
The requirements arrive in two phases:
| Phase | Tire manufacture date | Main effect |
|---|---|---|
| Phase one | January 1, 2029, through December 31, 2032 | Initial rolling-resistance limits and wet-grip requirement |
| Phase two | January 1, 2033, and later | Stricter rolling-resistance limits |
The manufacture date matters more than the purchase date.
A tire manufactured before January 1, 2029, does not become illegal when the calendar reaches 2029. Previously manufactured inventory and tires already installed on vehicles are outside the new minimum-performance requirements.
Drivers can identify the manufacture date using the four-digit date portion of the DOT Tire Identification Number. For example, 2429 identifies a tire manufactured during the 24th week of 2029.
That DOT code may become more important during the transition as retailers sell remaining pre-2029 inventory beside newer compliant models.
Are existing tires banned in California?
No.
The regulation does not require Californians to remove compliant, serviceable tires already installed on their vehicles. It does not create a new roadside efficiency test, annual tire-efficiency inspection or driver citation for owning a tire manufactured before 2029.
Existing safety laws still apply. A tire can remain illegal or unsafe because it lacks sufficient tread, has exposed cords, contains serious structural damage or otherwise violates ordinary roadworthiness requirements. The new efficiency regulation does not change those basic responsibilities.
If your current tires are safe, correctly sized and in usable condition, the CEC’s 2026 decision gives you no reason to replace them early.
Did California ban 70 percent of replacement tires?
Not in the way that headline suggests.
Industry representatives have said that a large percentage of current replacement-tire models would fail one or both future efficiency thresholds if they were manufactured unchanged after the deadlines. That is a snapshot of today’s products measured against tomorrow’s standards.
It does not account for:
- New tire compounds introduced before 2029 or 2033
- Existing models redesigned for lower rolling resistance
- Discontinued models replaced by compliant successors
- Tires qualifying for separate performance categories
- Tires meeting one of the program’s specialty exclusions
- Previously manufactured inventory remaining legal to sell
The accurate statement is that many current models may require changes before they can continue being manufactured for unrestricted California sale after the applicable deadline.
The future number of available tire models remains unknown. Anyone claiming to know exactly how many choices will disappear in 2029 is forecasting manufacturer product plans that have not been published.
What is rolling resistance?
Rolling resistance is the energy a tire loses as its tread and sidewall deform while traveling along the road. The engine or electric motor must replace that lost energy.
A tire with lower rolling resistance can reduce gasoline or electricity consumption. Tire construction, rubber compound, tread design, inflation pressure, load, temperature and alignment all affect the real result.
California measures efficiency through an EU-correlated rolling-resistance coefficient expressed in newtons per kilonewton. Lower numbers indicate less resistance.
The final program uses different limits for different tire categories:
| Covered tire category | 2029 maximum RRC | 2033 maximum RRC |
| Standard covered replacement tire | 9.0 | 7.1 |
| Long-life tire | 9.4 | 7.8 |
| Ultra-long-life, qualifying UHP, run-flat and extended-mobility tire | 9.8 | 8.5 |
| Low-load-index tire | 9.5 | 7.6 |
| Light-truck and commercial replacement tire | 9.0 | 7.8 |
When a tire qualifies for multiple covered categories, the regulation generally applies the numerically higher—and therefore more lenient—limit.
The category system is important. California is not demanding that an ultra-high-performance tire, run-flat and basic passenger-car touring tire achieve an identical rolling-resistance number.
Does better tire efficiency reduce traction?
Lower rolling resistance does not automatically mean less grip, but tire engineering always involves compromises. Rolling resistance, dry traction, wet braking, tread life, snow performance, ride quality and noise measure different characteristics.
California included a separate wet-grip standard to prevent manufacturers from pursuing efficiency without maintaining minimum wet-braking performance.
Covered tires manufactured beginning January 1, 2029, generally must achieve a relative wet-grip braking performance index of at least 1.0. Qualifying all-season winter-performance tires, approved emergency-vehicle tires and tires sold through the program’s last-resort process can receive different treatment.
CEC testing found that most tires it evaluated already met the proposed wet-grip floor. The Commission concluded that its efficiency requirements can be achieved without reducing safety or tread life. That remains the state’s technical finding—not a guarantee that every compliant tire will perform equally well in every condition.
Drivers should continue comparing wet braking, dry handling, tread life and winter capability instead of choosing a tire solely because it carries a good efficiency rating.
Our guide to reading tire sizes explains the sizing information that still must match the vehicle. Efficiency does not correct the wrong width, diameter, load index or speed rating.
Which tires are excluded from the California regulation?
The CEC’s official Replacement Tire Efficiency Program page lists numerous excluded or specially treated tire types:
- Properly classified competition tires
- Winter-type snow tires
- Qualifying all-season winter-performance tires
- Used and retreaded tires
- Deep-tread tires
- Tires designed for ATVs and other off-road vehicles
- Qualifying large off-road tires rated for speeds up to 99 mph
- Motorcycle tires
- Temporary-use spare and space-saver tires
- Tires with a nominal rim diameter of 13 inches or less
- Limited-production tires below the program’s 15,000-unit threshold
- Tires sold for authorized emergency vehicles
- Tires with a load index of 122 or higher
- Tires incapable of sustaining speeds above 50 mph
Each exclusion has a technical definition. A seller cannot turn a normal street tire into a competition tire by adding “track” to the product description and a photograph of a checkered flag.
Are performance and track tires still legal?
Yes, but classification matters.
Qualifying competition tires are excluded from the minimum standards. Qualifying ultra-high-performance tires remain covered but receive more accommodating rolling-resistance limits than ordinary passenger-car tires.
That means California has not issued a blanket ban on track tires or ultra-high-performance street tires. Some existing models may nevertheless require redesign, recertification or replacement if they do not meet the definition of a competition tire and exceed the applicable UHP limit.
Enthusiasts should not assume every 200-treadwear tire is exempt. The competition-tire definition considers technical factors that include tread depth, speed rating, treadwear classification and manufacturer designation.
For most street-driven performance cars, the practical buying process remains familiar: select a tire that fits, supports the vehicle’s load, matches its speed capability and provides the required wet and dry traction. Our vehicle fitment guide covers why exact specifications matter before ordering any performance component.
What happens to snow and all-weather tires?
Winter-type snow tires are excluded.
Qualifying all-season winter-performance tires can also receive an exemption from the rolling-resistance and wet-grip minimums. To qualify, the tire must meet defined snow-traction testing requirements and carry the three-peak mountain snowflake marking.
The marketing term “all-weather” alone does not establish an exemption. The tire must satisfy the regulation’s objective criteria.
Drivers traveling through the Sierra or other snow regions should continue selecting tires around actual winter conditions and chain-control requirements. A high efficiency rating is not a substitute for winter traction.
Will tires cost more under the California rules?
The most honest answer is probably, but the amount remains disputed.
The CEC estimates these average incremental costs and savings:
| Period | Estimated added tire cost | Estimated lifetime energy savings | Estimated net savings |
| 2029–2033 | $1.50 per tire; $6 per set | $85 per set | $79 |
| 2033 and later | $6.50 per tire; $26 per set | $179 per set | $153 |
The calculations assume gasoline costing $4.60 per gallon and a typical four-year tire life. California projects a phase-one payback period of approximately three to four months and a phase-two payback period of approximately seven months.
These are regulatory estimates, not promised store prices. Actual costs will vary by vehicle, tire size, brand, driving distance, electricity or fuel price and manufacturer response.
Industry organizations have challenged the state’s assumptions. SEMA argued that the economic analysis might understate product-development costs, enforcement issues and the potential loss of lower-priced choices. Tire-industry representatives have also raised concerns about compliance by small or foreign manufacturers.
Both points can be true: efficient tires can reduce energy costs, and complying with a new testing and reporting program can increase manufacturing and retail costs. The actual balance will not be visible until compliant 2029 products reach stores.
How will California enforce the program?
Manufacturers and brand owners must submit required tire data to a California database. Reported information includes rolling resistance, wet grip, efficiency rating and other model characteristics.
Retailers will use the database to determine whether a covered tire is approved for California sale. The CEC can conduct compliance testing and move noncompliant models from the approved database to an archived list.
The enforcement focus is the commercial chain: manufacturers, brand owners, testing laboratories and retailers. The regulations do not establish individual consumer reporting or require motorists to prove a tire’s efficiency during a traffic stop.
The program also includes a last-resort mechanism when a compliant tire is not reasonably available in sufficient quantities for a particular vehicle application. That provision is especially relevant to older vehicles and unusual tire sizes.
What will EV owners notice?
Lower rolling resistance can increase electric-vehicle range just as it can improve gasoline mileage. EV owners may notice the effect because tire efficiency is reflected directly in miles available from a battery charge.
But EV tire selection involves more than range. Electric vehicles are often heavy and produce immediate torque, placing significant demands on load capacity, wear and traction. Drivers must continue following the manufacturer’s tire-size, load-index and speed-rating requirements.
An efficient tire that lacks the required load capacity is not an upgrade. It is the wrong tire with an impressive spreadsheet.
What should the average California driver do now?
Nothing unusual.
Continue replacing tires when tread depth, age, damage or uneven wear makes replacement necessary. Maintain the recommended pressure and correct alignment, because underinflation and poor alignment increase rolling resistance regardless of the tire’s laboratory rating.
When shopping for tires after 2029:
- Confirm the correct size, load index and speed rating.
- Check the DOT manufacture date.
- Compare wet grip, expected tread life and efficiency.
- Verify winter or competition classification when relevant.
- Ask whether an older tire model has been replaced by a compliant successor.
- Do not assume the least expensive tire produces the lowest total operating cost.
- Do not assume the most efficient tire is automatically best for every vehicle or driving condition.
The same fitment-first approach applies when shopping through Pro Street Online. Match the tire or performance part to the actual vehicle and use case. Regulations may change the products on the shelf, but they have not made “close enough” a valid specification.
The bottom line
California’s replacement-tire efficiency rules begin in 2029, not immediately. They apply to newly manufactured covered tires sold in California, not tires already installed on privately owned vehicles.
The program sets rolling-resistance limits, requires minimum wet-grip performance for most covered tires and provides separate categories or exclusions for numerous specialty applications. It may change future prices and reduce the availability of some current tire models, but the size of those changes remains unknown.
California did not outlaw 70 percent of the tires currently on the road. It told manufacturers that many future replacement tires must roll more efficiently and still meet a wet-braking floor.
That is less dramatic than a statewide tire confiscation. It is also considerably more useful.