Oh I shout about microplastics from tires too.
That's the largest direct contributor to microplastics.
It's interesting to me how those posts are largely ignored, while this one about laundry pods has kinda exploded on me.
I bike for many reasons, but one of them is that riding on skinny tires carrying only the weight of the bike and the rider gives a heck of a lot less microplastics than me driving my car.