Caterpillar heavy equipment compaction wheels. This reminds me of Theo Jansen's Strandbeests. 2:04 video:
https://www.youtube.com/watch?v=1_fKA-JjVIM
Previously:
https://www.homemadetools.net/forum/...843#post140376
https://www.homemadetools.net/forum/...454#post139076
https://www.homemadetools.net/forum/...097#post138108
https://www.homemadetools.net/forum/...924#post137518
https://www.homemadetools.net/forum/...557#post136131
https://www.homemadetools.net/forum/...569#post128217
