What wood knots look like inside a tree trunk - photo

[Jon]

What wood knots look like inside a tree trunk.

Fullsize image: https://s3-us-west-1.amazonaws.com/h...k_fullsize.jpg

[jdurand]

So if you cut a tree just above and just below a bevy of branches then knock out the inner bits you have a spoked wheel.

[Frank S]

So if you cut a tree just above and just below a bevy of branches then knock out the inner bits you have a spoked wheel.

Sure looks like it even have the hub as well.

[FEM2008]

I won't be surprised that is how the first spoked wooden wheels came about.