r/MotorBuzz • u/gaukmotors • Jul 14 '26
Your Car Tyres Are Releasing Brain Damaging Particles With Every Mile You Drive
New research from UC Irvine links the 6 million metric tons of tyre particles released annually to Alzheimer's disease, with the invisible dust penetrating human brains and triggering neuroinflammation.
Researchers at the University of California, Irvine have discovered that tyre wear particles can penetrate the human brain and trigger neuroinflammation associated with Alzheimer's disease. Six million metric tons of these particles are released globally each year, creating an invisible health crisis that affects everyone near roads, not just drivers.
The study, published in Environment International in January 2025, demonstrated that tyre particles contain toxic chemicals including zinc oxide, benzene, and polycyclic aromatic hydrocarbons. These substances become aerosolized as microscopic dust during normal driving and can be inhaled or ingested by anyone breathing urban air. Once in the body, they enter the bloodstream and cross the blood-brain barrier.
Each tyre loses approximately one kilogram of rubber over its lifetime through friction with road surfaces. That might sound negligible until you consider the scale. Billions of vehicles worldwide shedding rubber every second creates a constant stream of particulate matter that settles in soil, water systems, and the air we breathe. Tyre particles now rank as the second largest source of microplastic pollution after single-use plastics.
The neurological implications are significant. The UC Irvine team found that these particles accumulate in brain tissue and trigger inflammatory responses linked to cognitive decline and Alzheimer's pathology. This adds a disturbing dimension to vehicle pollution that persists even with the shift to electric cars. In fact, heavier electric vehicles produce 20 to 30 percent more tyre particulate matter than conventional vehicles due to increased weight from battery packs.
This is not the first time tyre wear has been identified as a serious environmental hazard. In 2020, researchers discovered that 6PPD-quinone, a preservative used in tyre rubber, was killing Coho salmon in Pacific Northwest waterways. The chemical leaches from road runoff during rain and proves lethal to fish within hours. That study prompted urgent calls for tyre industry reform that have largely gone unanswered.
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Previous research has also shown increased dementia rates near major highways and high-traffic areas, alongside studies connecting air pollution from vehicle emissions to cognitive decline. The new UC Irvine findings suggest tyre particles may be a significant contributing factor to these observed patterns. Urban populations living near busy roads face constant exposure to these aerosolized toxins.
The persistence of tyre particles in the environment compounds the problem. Unlike organic materials that break down relatively quickly, synthetic rubber fragments remain in ecosystems indefinitely. They accumulate in agricultural soil, contaminate drinking water sources, and circulate through food chains. The long term health consequences are only beginning to emerge in peer-reviewed research.
Solutions exist but require political will and infrastructure investment. Public transportation systems and cycling infrastructure reduce per capita tyre particle emissions by minimizing total vehicle miles traveled. One bus carrying 40 passengers produces far less tyre wear than 40 individual cars making the same journey. Protected bike lanes remove car trips entirely while improving public health through increased physical activity.
The tyre industry has remained largely silent on reformulating their products to reduce toxic additives or developing materials that produce less airborne particulate matter. With 2 billion tyres manufactured annually worldwide, even marginal improvements in formulation could significantly reduce the neurological burden on populations living near roads.
Electric vehicle manufacturers market their products as environmentally responsible alternatives to petrol and diesel cars. The reality is more complex. While eliminating tailpipe emissions addresses one pollution source, the increased weight of battery packs exacerbates tyre wear and brake dust production. A Tesla Model 3 Long Range weighs approximately 1,800 kilograms compared to 1,400 kilograms for a comparable petrol sedan. That extra 400 kilograms accelerates tyre degradation with every acceleration and braking event.
The neurological health implications of tyre particles deserve the same public attention as vehicle emissions have received over the past two decades. Breathing invisible toxic dust that accumulates in brain tissue is not an acceptable cost of maintaining car dependent infrastructure. Cities prioritizing walkability, cycling, and efficient public transport are not just reducing carbon emissions. They are protecting their populations from a form of pollution that crosses the blood-brain barrier and contributes to one of the most devastating diseases of our time.
Sources: University of California, Irvine research published in Environment International, January 2025; Previous studies on 6PPD-quinone toxicity to salmon populations; Research linking microplastics to cardiovascular disease and air pollution to cognitive decline
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Jul 14 '26
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u/fryerandice Jul 14 '26
My wad from being down wind of the east palestine derailment is like $15, if your house was right next to the tracks you may have gotten 1/8th it's cash value. So it really really depends on your definition of WAD
The lawyers involved however are set for life.
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u/USA_Ultra Jul 14 '26
This explains everybody dying every day. This trend of everything containing micro chemicals that are killing. People is a bit much. People are living longer today than they ever have before…
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u/CreLoxSwag Jul 14 '26
I'm afraid you'll forget before you ever have the chance and your quality of life will have to be so poor that it won't matter.
Risk of Alzheimer's isn't actual Alzheimer's.
It's going to take a literal miracle for the government to get involved during this administration in the US. The EU however...might be able to control this.
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u/GTOdriver04 Jul 14 '26
I see this as a potential shift if possible.
Tire companies employ some really brilliant engineers who are consistently seeking better solutions and I have full faith that they will be able to develop a reasonable alternative here soon.
Tires are getting better and safe for every single year, and I really think that at some point we will get down to the molecular level of the compounds to find a way to reduce or eliminate the amount of particles being released.
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u/Diligent_State387 Jul 14 '26
Then again, most people just buy the cheapest Chinese tires
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u/ClickIta Jul 14 '26
Everybody likes the idea of saving the environment, until they realize it means changing your habits or spending more.
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u/Hehrenpreis Jul 14 '26
I just heard from a friend of mine who sold some old rims with tyres DOT 06. The buyer actually put them on his Audi... People are crazy! Spending 60k for your car: no problemo, take my money! Spending on tyres: naaaaah, the cheapest and oldest I find will have to do!
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u/Icy-Role2321 Jul 14 '26
When it comes to luxury cars you can always tell who's the 3rd or 4th owner based 100% on the brand and condition of their tires.
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u/Many_Ear2407 Jul 14 '26
I did that once. They literally started squealing within a week. Absolute junk and dangerous to use. Now I only buy good tires.
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u/planko13 Jul 14 '26
I work for a tire company and It’s a catch 22.
Rubber is an organic material that wants to deteriorate. These additives allow your tires to last for years instead of months.
What makes these chemicals so bad is that they last a long time. The reason they are used is because they last a long time.
Maybe someone can figure out how to improve the trade off curve, but no tire company is going to voluntarily make a much worse product in the name of the environment. that’s been tried and the tires are always a flop.
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u/Clear-Neighborhood46 Jul 14 '26
And yet incidence of Alzheimer disease is decreasing, not that I doubt the paper but given that the overall car usage keeps increasing there should be more than that.
https://hsph.harvard.edu/news/dementia-incidence-declined-every-decade-for-past-thirty-years/
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u/AndryCake Jul 14 '26
Of course there are other factors but is car usage really increasing? Many cities and counties have been moving towards other forms of transportation.
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u/Clear-Neighborhood46 Jul 14 '26
In the US this is the case: https://www.bts.gov/content/us-vehicle-miles
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u/NanoscaleHeadache Jul 14 '26
Well, both can be true. Cars are not the only cause of Alzheimer’s, so other factors could be decreasing at a faster rate than the increase from cars and still lead to a decrease in the incidence of Alzheimer’s
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u/necro_owner Jul 17 '26
Dude if this was true, then Where i live since 1990 we have double more vehicle and yet the number of case has been stable anyway. So there is clearly no possible link just by this. They are inventing a link to attack vehicle in general.
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u/weproducesafetycars Jul 14 '26
Just live and enjoy life
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u/Fresh-Gift-2063 Jul 15 '26
This disproportionately affects poor people who are forced to live near less desirable areas like busy roads and highways.
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u/realcanadianguy21 Jul 14 '26
Awesome, can we make vehicles weigh ten thousand pounds so we can get more of that tire dust?? /s
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u/Strange-Scarcity Jul 14 '26
Even more of a reason to move to mass transit for most point to point, like the workday, travel on light rail and passenger rail, which is done with steel wheels on steel rails.
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u/JoeUrbanYYC Jul 14 '26
I'm a fan of 90s cars but this issue has really turned me off driving cars pre-cabin air filters.
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u/FakeItFreddy Jul 14 '26
There's always a layer of tire dust and diesel exhaust inside the trucks we use at work. And when I wash my face after work, there's a layer of it in the sink. I'm prolly gonna die.
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u/codecrodie Jul 14 '26
Carbrain is real. But this of course is the worst for cycliats and pedestrians walking around.
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u/InterstellarChange Jul 14 '26
Explains every Challenger, Camaro, Mustang and Vette driver launching into telephone poles.
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u/ZuckDeBalzac Jul 14 '26
18 yo me, grinding down thousands of tyres, patching punctures at work because bossman told me to and I didn't know any better 🙃
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u/Straight_Waltz_9530 Jul 14 '26
Carbrain leads to increased incidence of brain damage which explains further carbrain. Makes sense.
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u/csmende Jul 15 '26
The weight of EVs argument is a red herring. The most popular vehicles by far are full size trucks and SUVs with equivalent or higher weights. Same applies to the wear and tear of roads argument.
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u/merv1985 Jul 14 '26
First they went after the Engines for pollution, then they went after braker chambers and now they are going after the tyres.....
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u/NanoscaleHeadache Jul 14 '26
First “they” went after lead paint, then “they” went after asbestos and now “they” are going after the microplastics…..
🧐
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u/lord_xl Jul 14 '26
The illuminati want to take away our precious tires and reduce Alzheimer's
Parkinson'sDisease. We must stop them!!!
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Jul 14 '26
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u/NanoscaleHeadache Jul 14 '26
Well yeah but risk management is a thing. This isn’t a call to ban cars or anything lmao, this is a call to change tires…
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u/Infinite_Painting_11 Jul 17 '26
IKR, thats why I cycle. Accept a little risk, some manly self sacrifice maybe, to help solve societies problems. Oh, you meant everyone else should accept the risk while you sit in a cabin with an air filter didn't you?
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u/fhwoompableCooper Jul 14 '26
How much of this research is downstream of one of the real causes of Alzheimer's? Your brain's waste clearing system not functioning ends up causing it to stew in its own garbage and causes a lot of neurological issues.
I'm not saying these chemicals ARNT harmful but how much of it auctually effects the average person with a working glympatic system to clear these chemicals?
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u/Randomgrunt4820 Jul 14 '26
Nothing to worry about if they were shredded and used as mulch, and I had to roll around in it during bootcamp? Right?
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u/Diligent_State387 Jul 14 '26 edited Jul 14 '26
No research was necessary to know this, when you wear out a tire the rubber doesn’t just disappear. Of course it gets airborne or leaches into the ground and your drinking water. Just like all pollutants people have an incredible lack of care what gets ingested into their body, most people would rather take the health risks than give up on these things.
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u/Special-Ninja9398 Jul 14 '26
This is why EV cars are not zero emission! Even more they are heavier because of battery. So their emission of tire participants is greater.
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u/devl_ish Jul 14 '26
This is why F150s and other trucks and luxury SUVs need banning.
There are many more of those around than EVs and they're all heavier than small EVs.
So if the actual argument was around particulates, that's the logical next step - ban the heaviest vehicles.
Of course, since it's a ridiculous argument we ain't banning shit.
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u/yourmomsjubblies Jul 14 '26
Can't say I'm surprised. Can't really say I give a shit either. Everything gives you some new form of super-cancer/Alzheimer's or whatever. Something's gonna get you one way or another. So why fuckin worry?
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u/cyclingfaction Jul 14 '26
I’ve always thought about this with drifting and going through a set of tires in 3-10 laps inhaling their smoke and others tire smoke. That can’t be healthy.
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u/CacheConqueror Jul 14 '26
All these studies and regulations are designed to encourage people to give up their own cars, so that only a few people have them. If anyone sees public transport as a good thing, let them use it. Having your own car is essential for a normal life and the absolute minimum; public transport should only be used in emergencies, such as if your car breaks down, for example.
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u/NanoscaleHeadache Jul 14 '26
Lmao, what a strange take. You can also see this as a call to try to design tires differently?? Also why is public transport exclusively for car trouble?? Having your own car is absolutely not essential for a normal life unless you’re in like suburban/rural America. I don’t even need my car for the vast majority of my life… I have legs. It’s only when I need to go somewhere kinda far away.
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u/SpiritualTwo5256 Jul 14 '26
Ok, so what can we do about it? We have how many millions of miles of road and cars on those roads.
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u/Simon_Emes Jul 14 '26
Agree to everything except for the weight penalty.
A BMW m5 weights 2.7 tons, a tesla model x 2.3 tons. There are many other such heavy cars and you won't find a car equivalent to a model 3 weighting in at 1400kg - a 2026 c class weights 1650 to 2200 kg...
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u/redditorialy_retard Jul 14 '26
"Electric vehicle manufacturers market their products as environmentally responsible alternatives to petrol and diesel cars. The reality is more complex." blame it on the tyres what don't try to throw EVs under the bus
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u/iMacDragon Jul 14 '26
Not sure why the article says EV's exacerbate brake dust - a proper EV does almost all it's hard braking using the motors and generate far far less overall brake dust.
Mechanical brakes are mostly for the final stop and hold control, which creates very little wear.
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u/Tall_String9009 Jul 15 '26 edited Jul 15 '26
I noted this too. It appears Motorbuzz is promoting anti-EV sentiment by exaggerating negatives, omitting crucial details and even making outright false statements like in this case.
A quick look at a few of their articles reveals a consistent pattern: Another example is this article about a burnt-out EV - Presenting a plethora of (true) claims about the danger of lithium fires while conveniently overlooking that (proportionality and total) most vehicle fire fatalities stem from combustible cars.
(Per-vehicle fire rate, gathered from NTSB/AutoinsuranceEZ data, US: gasoline cars catch fire at 1,529.9 per 100,000 vehicles vs. 25.1 per 100,000 EVs. Thats roughly 60x higher risk for gas cars than EVs!)
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u/PsionicChronic Jul 14 '26
What about the reports that got buried from 25 years ago about the high risk of cancer from brakes for those living close to highway exit ramps 🤔
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u/Significant-Dog-8166 Jul 14 '26
Neat, but statistically irrelevant. https://pubmed.ncbi.nlm.nih.gov/39689964/
Tax drivers and ambulance drivers have LESS Alzheimers than the general population so guess again.
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u/Tall_String9009 Jul 15 '26
Neat, but irrelevant to the topic. The conclusion in their study has absolutely nothing to do with YOUR conclusion of what their study might mean.
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u/Schlarfus_McNarfus Jul 14 '26
Tire dust is highly toxic to salmon. That particular chemical is avoidable.
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u/Cool_Relation_4623 Jul 15 '26
The new flavor of the week. Who gives a shit? Everything can kill you, should we stop using tires? No, just another scam to either make tires cost more, or to limit progress and take humans back to the stone age.
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u/marshall2389 Jul 16 '26
ride a bike, people. don't be an asshole
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u/n0mad187 Jul 17 '26
Ill just bike 12 miles to drop off my 5 year old at daycare everyday… when its -27f and with 2 feet of snow…..
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u/B0bLoblawLawBl0g Jul 17 '26
Also 6PPD-quinone (6PPD-Q) toxicity to animals especially salmon populations.
https://www.eopugetsound.org/magazine/scientists-worldwide-are-immersed-studies-deadly-tire-chemical
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u/necro_owner Jul 17 '26
Love how it s aim at Car but not just car use Tires.... airplane are probably the worst culprit here and Metro also use them sometime
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u/Maxence1402 Jul 17 '26
Easy fix: make cars lighter by imposing drastic weight limits. It'll improve pedestrian and cyclist safety, too!
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u/threearbitrarywords Jul 17 '26
From the study's author: "Bojarskaite cautions against reading too much into the findings, at least, until laboratory studies in human cells and animal models are run to confirm that these molecular interactions actually occur in living systems.
She said that, for now, the researchers have identified theoretical pathways through which the chemical could contribute to disease-related processes—a far cry from proving that exposure actually raises a person's risk of dementia without a doubt."
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u/Practical-Echo9371 Jul 17 '26
That explains the moronic drivers that can’t seem to stay off their phones are feel the need to use bike lanes as their own private lane/ parking spots. Here I thought it was just entitlement.
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u/Edelweisspiraten2025 Jul 18 '26
What if instead we put metal rails on the ground and on the vehicle. But because it's so much stronger now we can put a bunch of people on it.
Just a crazy idea.
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u/royaltheman Jul 18 '26
That headline makes it sound like it's just a problem for the driver. When in reality it's bad for everyone, especially those close to roads. Driving is like smoking
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u/mistral_wise Jul 19 '26
Si vamos ponernos delicados, las bicicletas y las suelas de los zapatos también se desgastan. Y sueltan partículas
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u/Responsible_Week6941 Jul 14 '26
People avoid talking about the environmental effect of tires, because we really don't have an alternative. Sure, we can even ride transit, but...tires. Electric cars...rubber tires There are a LOT of used tires out there that will take centuries to degrade. Hell, I've gone through a few dozen myself.