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Racing bike, laminated mahogany hollow frame, by ship builder Sueshiro Sano, 2022
(sanomagic.world.coocan.jp)
I thought some people here might appreciate it. More of Sueshiro Sano´s stunning work: http://sanomagic.world.coocan.jp/englishindex.html
Depending on the laminate and parts design it could be pretty functional. I don't think you'd want to do more than take it for a couple of laps around a track though.
Unless you're Sam Pilgrim. That dude will ride any bike down the gnarliest obstacles. A few months back he rode a bike made of bamboo that collapsed under him after going off a jump with it. The bike had only been ridden for about half a day.