Bamboo Bicycle Club bietet diverse Fahrradrahmen aus Bambus und Alu an, die man sich dann selber zusammenbauen kann. Gar nicht mal hässlich die Dinger und auch nicht sonderlich teuer.
We choose bamboo as it is easily accessible and grows in most countries and is easy to build using just hand tools. As it grows, it uses 30% more CO2 than conventional timber. Once built into a bicycle it has stronger tensile strength than steel and offers a unique ride with superior vibration dampening,
(Direktlink, via Designboom)