Discovered in a bog in what is now Slovenia in 2002, the Ljubljana Marshes wheel is a wooden wheel/axle combination dated to about 5,150 years ago. What it was attached to is not known ...

If you do accidentally split the wood, squirt glue into the crack ... Push the rod through the axle supports and bolt one wheel on, keeping the locknut flush with the axle end.

In fact, a carpenter named William Somers was building 50-foot wooden wheels at Asbury ... 100,000 parts went into Ferris’ wheel, notably an 89,320-pound axle that had to be hoisted onto two ...