micromobility - Bikes, scooters, boards: Whatever floats your goat, this is micromobility
Ebikes, bicycles, scooters, skateboards, longboards, eboards, motorcycles, skates, unicycles, heelies, or an office chair: Whatever floats your goat, this is all things micromobility!
"Transportation using lightweight vehicles such as bicycles or scooters, especially electric ones that may be borrowed as part of a self-service rental program in which people rent vehicles for short-term use within a town or city.
micromobility is seen as a potential solution to moving people more efficiently around cities"
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Spew is probably the qualifier there, referring to how the amount of particles is tied to vehicle weight (similar to road wear). A heavy e-bike probably sheds more than other bikes, but also probably still significantly less than even the average truck (to the point bike vs ebike is probably negligible in most cases).
Well, also even a fat-tire ebike has a significantly smaller contact patch than most cars (edit: perhaps even smaller when compared to one car tire).
You ignore two other important factors that affect tire wear. Tread and compound. When you take a look at a soft compound mtb downhill tire with aggressive tread, you will notice it will wear down extremely quick, way faster than a road car tire.
Are loads of people using mtb downhill tires (on roads?), or something with a better formulation and less aggressive tread? Longer-lasting tires is a clear incentive.
Knobby tires on a truck/jeep to fetch groceries seems like the same issue but worse. Though either way, IIRC this is a bigger issue when tires are brand-new.
I think you are underestimating how much power/friction is going into that much rubber on vehicles that are thousands of pounds empty and can go 50mph+ and the braking force needed too (which also creates dust). It's an entirely different scale, especially oversized trucks and semitrucks.