Unsure of the proper flair, so engineering it is.
In: Engineering
Because of the hardness of the concrete compared to the tires, the tires give up first leaving parts of the tires on the road.
If your wheels were made of metal the road will wear faster than the wheels.
Of course the road is not perfectly even and there is a chance the wheels will pull up tiny bits of rock/concrete from the road but are very small.
This is the same reason why we use diamonds for cutting tools, they are super hard and they wear the other material first.
A good example of this is the Jerry Rigs Everything YouTube channel where he tests the hardness of phone screens using different materials.
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