I figured I'd share my research by writing it up... except that toward the end of my research I found conflicting information. And I don't feel like researching more so I'm just going to post as is with pointers to the conflicts.
the wheel is the rubber-tire+metal-rim, the thing you take off when you get a flat tire.
It is mounted to the car/truck by bolting it onto the hub, which is the part of the truck you attach wheels to, the thing that contains the brakes. (and btw, let the rest of the internet know that these are not "breaks")
when you mount a wheel onto a hub, you have lug nuts holding it on. You might have noticed on a passenger car that the underside of the lug nuts have a sort of hemispherical shape such that screwing it on seats and centers the nut into a corresponding dish on the wheel. This (once all the lug nuts are seated) aligns the center of the wheel with the center of the hub. That's the stud-pilot system, the studs do the piloting (centering) also called with a brand name(?) Budd.
There is also a hub-pilot system, where the wheel is automatically centered on the hub because the hub is essentially conical. In this case the lug nuts just bolt on and don't participate in the piloting.
one type of Dayton wheels is another hub-piloting system, but with one big center screw instead a collection of lug nuts. You have seen these mostly on 1950's style sports cars with flashy wire-spoked wheels and that "flying wing" nut in the center holding the wheel on. https://www.daytonwheel.com/
But I guess that's just for cars, because there is another Dayton wheel for trucks. It is a large metal piece that is something like spokes, but just 5 or 6 big ones and the wheel gets bolted on to the tips of that "star" hub. You can look at the pictures here https://thecampingadvisor.com/dayton-wheels-vs-budd-wheels/
But you'll notice that they also have pictures of the wire spoke style dayton wheel.
I think that's just a crappy website, but I've put enough effort in. YMMV, literally :)
the wheel is the rubber-tire+metal-rim, the thing you take off when you get a flat tire.
It is mounted to the car/truck by bolting it onto the hub, which is the part of the truck you attach wheels to, the thing that contains the brakes. (and btw, let the rest of the internet know that these are not "breaks")
when you mount a wheel onto a hub, you have lug nuts holding it on. You might have noticed on a passenger car that the underside of the lug nuts have a sort of hemispherical shape such that screwing it on seats and centers the nut into a corresponding dish on the wheel. This (once all the lug nuts are seated) aligns the center of the wheel with the center of the hub. That's the stud-pilot system, the studs do the piloting (centering) also called with a brand name(?) Budd.
There is also a hub-pilot system, where the wheel is automatically centered on the hub because the hub is essentially conical. In this case the lug nuts just bolt on and don't participate in the piloting.
that information came from here https://buytruckwheels.com/pages/hubpilotvsbudd
one type of Dayton wheels is another hub-piloting system, but with one big center screw instead a collection of lug nuts. You have seen these mostly on 1950's style sports cars with flashy wire-spoked wheels and that "flying wing" nut in the center holding the wheel on. https://www.daytonwheel.com/
But I guess that's just for cars, because there is another Dayton wheel for trucks. It is a large metal piece that is something like spokes, but just 5 or 6 big ones and the wheel gets bolted on to the tips of that "star" hub. You can look at the pictures here https://thecampingadvisor.com/dayton-wheels-vs-budd-wheels/ But you'll notice that they also have pictures of the wire spoke style dayton wheel.
I think that's just a crappy website, but I've put enough effort in. YMMV, literally :)