Mary Arneson velomobiling.blogspot.com
Australian Greenspeed Anura trikes link together to form a tandem setup.
Two people going on tour need a way to carry their stuff - hence the trailer pictured above. The whole pedal-powered train runs to about 15 feet long, which is bound to be noticed while cruising comfortably along. And by replacing the front wheel of the rear trike, you have two independent vehicles - for those times when the riders just have to get away from each other.
Of course you are not limited to two - the current record is 93 Hase Kettwiesels and riders coupled together.
Imagine a 560-foot-long pedal-powered snake and you have the basic idea.
Try riding 93 diamond-frame bikes linked together.
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