Re:Why It Took So Long to Invent the Wheel (2012)
by maxerickson on Saturday October 29, 2016 @02:42PM
(#12825592)
If solid rather than spoked wheels were acceptable, an out-of-round wheel on an axle can be marked with a piece of chalk-rock held in place while spinning the wheel, and then abrasive stones can be used to true the wheel to the chalk mark.
That is a rudimentary lathe.