Thinking inside the box
Phil Bridge, a 21 year old design student at Sheffield Hallam University, is building bikes from cardboard. It's extremely inexpensive at around $30. But some worry that it won't hold up in inclement weather. You know, like when your backyard refrigerator box fort collapsed in the rain?
Bridge, states that it's very strong and it has a honeycomb core. It's mainly used in partition walling and packaging. So his idea is that people could buy them to see if they like biking. Then if they like it they can then upgrade to a normal bike. Nor is he alone. Ryan Perkins of Pacific SouthWest Container made this cardboard single speed from a PDF CAD drawing done on Bike Forest Pro.