Remember when gas stations had tire-changing machines? Now, think back to horse-and-wagon days. What did they do back then?
This is a "tiring platform" for a wheelwright's or blacksmith's shop.
It supported the wooden wheel evenly as a red-hot iron rim was forced over it. When the iron tire was cooled it compressed the hub and spokes, and set the "dish" of the wheel.
Found in "Mill Hollow" in Boscawen NH. (Loaded by hand with my trusty old Wyeth-Scott Power Puller!)
View attachment 103118
View attachment 103119
View attachment 103120