The wheel spokes are occluded by the brakes. More air is moved by the rotating tire that can fit through an opening in the middle.
If you look at trucks in the rain on the freeway, you see that there is a rolling mass of air moving outward and forward already.
That said, https://www.rimstyle.com/pages/directional.html

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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.tragectory: Line goes down and to the right.
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