[throwaway803453]

Does the focus on NVH imply that the increase of rolling friction over time is negligible compared to the tread lifetime ? Or is that partly of the reason to target lighter vehicles.

The above assumes the spokes(?) become stretched over time it would increase displacement of the center of rotation from the center of mass which if recall is what creates rolling friction.

[bkanber]

For two tires with equal interior volume, the rolling resistance of a tweel will be much much greater than the rolling resistance of a normal tire.

That said, tweels are typically designed to be much thinner and have much less interior volume than air-filled, in order to close the gap in rolling resistance. So you'd really need to compare a specific model tire against another specific model tweel in tests to know. But my intuition tells me that the rolling resistance will still be worse almost no-matter-what with today's tech.

So that's partly the reason they target lighter vehicles, and that's partly the reason they seem to be marketing around EVs specifically. That extra rolling resistance may be worth a few $s in gas each month vs only a few cents in electricity for the same driving conditions.

[KennyBlanken]

The marketing focuses heavily on reduction in disposed tires as the environmental benefit. If the tire were equal in terms of rolling resistance we'd see them at least mentioning it in the graphics.