Indeed it indicates that the bikes are about 40 years old - and that they were not a new idea at the time, and references the Long John Bikes from 1920s in the

Indeed it indicates that the bikes are about 40 years old - and that they were not a new idea at the time, and references the Long John Bikes from 1920s in the 4th paragraph. http://www.google.com/search?q=long+john+bike http://www.google.com/search?q=long+john+bike http://www.christianiabikes.com http://www.christianiabikes.com indicates 30 years for this particular iteration.