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... go round and round.
These are standard 36-spoke bicycle wheels, with the usual triple-cross linkage but reduced to silhouette form, constructed to scale (from my own bicycle) and then carefully oriented and positioned on a regular triangle/hexagon lattice in two interleaved layers (as per hexagonal close packing) for p3m1 plane symmetry.
Currently displaying a version in 2 shades of grey on white.