The first cardboard bike has been created by Phil Bridge, a design student from the UK. The design is almost finalized as the last few kinks are being worked out. The frame is completely made of cardboard so it’s all recycled and VERY green. The wheels are standard bike wheels made of rubber and metal but you won’t find any other materials besides carboard. It can hold a person up to 168 pounds and only costs $6 to make!! Retail value is around $25. This is awesome.