Radial nylon tire cutting machine. It cuts tires ranging from motorcycle tires up to tractor tires.
https://www.youtube.com/watch?v=SIEW5NBBEE8
Previously:
https://www.homemadetools.net/forum/...797#post119021
https://www.homemadetools.net/forum/...775#post118888
https://www.homemadetools.net/forum/...375#post116676