This monocycle replication from 1873 is an arresting engineering and mechanical feat . Created by a spaniard using nineteenth Century documentation and sometime - style handcrafting techniques , it uses a 6.16 - foot steering wheel , with a 238 - teeth inner segment . As you may see in the gallery , the quality of his work is simply amazing .

This Isle of Man from Burgos , Spain , created the whole thing by himself , casting the main bronze bike from a chip at oak tree model . He also used different brand alloy for different voice of the mechanics , depending on the tension they are going to meet . The saddle ’s suspension cake was treated in a forge to incur the necessary elasticity to make it make powerful .

The bid starts at $ 13,000 and have the caliber of the employment , I would make up that and more ( if I had the money , that is . ) [ eBayviaBoing Boing ]

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