What is this close-up picture? (WotsThat: Wheel spoke texture (macro))

Question

What object is shown in this zoomed-in close-up photo?

TerraShift · Accepted Answer

Wheel spoke texture (macro). Bicycle wheel spokes work almost entirely in tension, not compression; the wheel actually hangs from its top spokes as it rolls, which is why a wheel can still hold weight surprisingly well even with a few broken spokes.

Answer: Wheel spoke texture (macro)

More man made close-ups