Wheel
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A wheel is a rotating component intended to turn on an axle bearing. The wheel is one of the key components of the wheel and axle, which is one of the six simple machines. Wheels, in conjunction with
Spoked wheel of reconstructed Celtic funerary wagon, 550 BCE, Hochdorf Chieftain's Grave, Germany
The Ljubljana Marshes Wheel with axle, the oldest wooden wheel yet discovered, dating to the Copper Age (c. 3130 BCE)
A depiction of an onager-drawn cart on the Sumerian "War" panel of the Standard of Ur (c. 2500 BCE)
Solid wheels on a heavy temple car, contrasted with the lighter wire-spoked wheels of the black roadster bicycle in the foreground
Spoke
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A spoke is one of some number of rods radiating from the center of a wheel, connecting the hub with the round traction surface.
A spoked wheel on display at the National Museum of Iran, in Tehran. The wheel is dated to the late 2nd millennium BCE and was excavated at Choqa Zanbil.
The remains of a pair of cart wheels with metal axle assembly.
An ox-wagon in Aliwal North, South Africa. Note the three missing spokes and the metal tire.
Wooden spoke wheel with metal rim from antique truck on display in Underground Atlanta.