The Svetaswara Upanisad Chapter 1, Verse 4 goes like this
"We perceive Him as a wheel with one axis, three tiers, sixteen ends, fifty spokes, twenty counter spokes, the six sets of eight, whose one rope is manifold, which has three different paths of salvation and whose delusion arises out of two sets of actions."
Are there any cross-references? This seems to be after we invented Wheel with mechanized spokes...Any Vedic bikers :-) around Ay?