Tomorrow, Audi launches a collaboration series of bicycles with Portland, OR based studio Renovo Hardwood Bikes. The Duo collection is made up of three distinct models, each with a monocoque space frame made of hard wood. This frame technology offers the smoothest ride of any bike frame material for its ability to absorb shock and vibration while still being stiff, lightweight, and durable. The woods were selected to match the look of Audi vehicle interiors, and each is hand made at the Renovo studio. The bikes range in price from $6,530-$7,350, and while they don't come cheap, they're a steal compared to the R8. Buy them tomorrow through Audi of America. Click on the gallery above for images and descriptions of each of the bikes.