Hey, California track folks...are you aware of this BS?
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Well it is not "BS."
Internet outrage, or a path to opportunity?
"Did you know?
The tires that come on new cars are designed to give you better mileage, so you spend less time and money filling up your car. Unfortunately, replacement tires are often less efficient. That’s why your new car’s mileage might drop the first time you replace those new car tires. The efficiency gap between new car tires and replacement tires means that California drivers are paying nearly $1 billion in additional fuel costs – often without knowing why or how to fix it."
SOURCE: https://www.energy.ca.gov/proceeding...ram-proceeding
Sales!
Opportunity June 10!
I suspect that corporations that make and/or sell tires may be interested in this topic.
LOBBY!
We'll see!
Simple search results augmented by AI (NOT VETTED):
"California accounts for approximately 10% to 12% of the national replacement tire market, generally correlating with its share of the total U.S. vehicle population. With national aftermarket passenger tire shipments hovering around $43.39 billion annually, this puts California's localized replacement tire sales at an estimated $4 billion to $5 billion per year.
Key Entities and Industry Details:
- Total Volume:
The U.S. Tire Manufacturers Association (USTMA) projects total U.S. replacement tire shipments for passenger, light truck, and commercial trucks will be approximately
338.9 million units. - State Market Share: California is the largest single state market by volume, capturing roughly 10% to 12% of national replacement tire demand due to its massive base of registered vehicles.
- Economic Footprint: The statewide Tire Dealers industry is valued at $5.7 billion. This market is highly concentrated, supporting over 5,400 retail businesses and 27,000 workers statewide.
- Current Market Trends: The industry is heavily focused on specialized EV tires and fuel-saving, low rolling resistance designs driven by state regulations.
"If California’s proposed Replacement Tire Efficiency Program becomes law, it is estimated that a significant portion—potentially up to 50% or more—of current aftermarket passenger and light-truck replacement tires will be affected. Many performance tires, mud tires, and drag radials will be rendered illegal for sale in the state as they cannot meet the new maximum rolling resistance thresholds.
The far-reaching mandate is structured in two phases, ultimately forcing the replacement tire market to match the low rolling resistance characteristics of factory-original equipment tires.
The affected and banned tires would fall into specific categories:
- The "Lowest-Priced" Tier: The U.S. Tire Manufacturers Association has warned that aggressive rolling resistance rules will remove budget-tier tires from the marketplace.
- Performance and Track Tires: High-grip summer tires, drag radials, and track-specific tires (e.g., Michelin Pilot Sport Cup series, Yokohama AO52s) typically exceed the maximum rolling resistance coefficient and would be banned.
- Heavy-Duty Tires: Many mud-terrain and light-truck tires that prioritize durability over efficiency will not meet the thresholds.
- Consumer Cost: The standards are projected to save California drivers roughly $179 in fuel costs over the life of a set of tires, but will cost an individual an estimated $28.47 more per tire during Phase 2.
- Tire Lifespan Concerns: Industry coalitions (including SEMA and major manufacturers) argue that because low rolling resistance tires often use shallower treads to achieve efficiency, consumers will need to replace tires twice as often, which could increase long-term environmental emissions.
I remember my first trip to CA in 1985... Newport Beach.
I remember going for a run of about 5 miles and then feeling pain in my chest.
Then looking out from the Newport Beach Marriott and seeing an orange sky.
One of my colleagues said... don't you know that is smog?
Yikes.
For humans... balance can be important.
"There is rules."
- Leon.
Last edited by Mahler9th; Jun 3, 2026 at 04:34 PM.
Last edited by Mahler9th; Jun 3, 2026 at 04:38 PM.
In Mass, if I buy a combo smoke detector/CO detector, it has to be able to talk.
"There is rules."
- Leon.
Yikes. What to believe and from whom?
- Heavy-Duty Tires: Many mud-terrain and light-truck tires that prioritize durability over efficiency will not meet the thresholds.
- Consumer Cost: The standards are projected to save California drivers roughly $179 in fuel costs over the life of a set of tires, but will cost an individual an estimated $28.47 more per tire during Phase 2.
- Tire Lifespan Concerns: Industry coalitions (including SEMA and major manufacturers) argue that because low rolling resistance tires often use shallower treads to achieve efficiency, consumers will need to replace tires twice as often, which could increase long-term environmental emissions.
I’d argue that on high performance cars, like our Porsches, this is a direct threat to safety. Longer braking distances, less ability to handle the horsepower, shallower tread to dissipate water when it rains is an issue. Ive learned that citing “safety” concerns, especially in California, is what those in the legislature use when they want to control the population.






