The surface in contact with the dirt that displaces the surface to get a bite doesen't care if it is aluminum ar a laminated fibre.
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Jack, you be right with this comment, but I'm not talking about laminated fibre.
The shown layer, which touch the ground is RUBBER, normal rubber as an "average Joe" tire
Also important is the "profile" of the wheel to eliminate the gyroscopic effect - this is possible.
I discussed my idea a while ago with some tire specialist (when this new Michelin solid tire/wheel was coming out - this concept is still in testing, but the producer is still interest to get it in production...wait and see).
They said, the only problem with the idea is just the cost......they calculate about 10 000+ dollar for each wheel.