Tyres are an order of magnitude worse source of particles pollution than exhausts.
“We came to a bewildering amount of material being released into the environment – 300,000 tonnes of tyre rubber in the UK and US, just from cars and vans every year.”
Whereas “Tailpipes are now so clean for pollutants that, if you were starting out afresh, you wouldn’t even bother regulating them.”
Listed tyre companies (GT, ML) are generally ranked low on ESG risk.