Working on Vinod's bike now and I have this really cool segment of "aerodynamic" bamboo that grew in an oval shape. I'm thinking of using it for the seat tube since it's both really beefy and also has an interesting profile. I'm always leery of the torsional stiffness of bamboo after my first bike turned out to be kind of a bamboo noodle. The addition of expanding foam, plus the ultra-dense nature of these culms should alleviate that problem though. V is a big guy, a former rower and rugby player, so I need to make sure that the bike will stand up to the test.
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