Here's a bicycle for group rides in extremely cramped spaces. It's called the Circular Bike, and it's really just for fun.
Inventor Robert Wechsler used parts from 30-odd discarded bikes to make the merry-go-round that can reach speeds of 15 mph. He says that inevitably, someone always gets sick.
His creation essentially connects nine bicycles in a 12-foot diameter ring. There was some welding involved, but sections are bolted together so it can be dismantled ... more »


