Pics way bigger than it needs to be. 
Six vortexes. You'll never touch the ones at ground level.
Here's proof:
Dirt is carried over the top of the tire before is it scoured out of the tread. You can see the middle vortexes.
For examples done right I'd point to the Aptera
aptera.scratchpad.brandetize.com/wp-content/uploads/2021/06/6.png
The modern style is to wear your clamshell fenders backwards.
https://external-content.duckduckgo....6pid%3DApi&f=1
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
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