I saw a pickup truck that had spiked lug nuts on its front wheels. (But not the rear, which was dual wheel.) They were 6 inches long. Why spikes instead of knives? What does he use for a lug wrench? They looked freshly-painted, blue.
there is a long special socket that goes over the spike and catches the end of the spike near the rim where it is like a regular lug nut or has groves that the socket will catch.
I learned something. I’ve seen them on semi’s. I always assumed they were just some sort of cover, not the actual nut.
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What happens if you hit something with them, like one of those steel poles that protect utility equipment in parking lots?
If wheel theft was an issue I suppose they would help.
You seem to know all the answers you tell us.
Well I’ll start with hurt pride.
Ahhh…these are the ones I’ve seen. Fairly certain I remember a truck driver having a little issue scaling in, rubbing the guardrail with his front tire, and shedding a pile of those in the process.
When we see these my wife and I always think of the movie Ben Hur.
Why I asked why not knives.
Hmm, Ford cultivator?
Or 
tiller.