Originally Posted by
rohorn
Rohorn, where did you find that cartoon??? But that's much higher than it needs to be.
What is too tall about it? Do you expect to obscure the lower rider's view? I don't think you've completely thought everything through, especially starting and stopping. If the top rider mounts first, the other rider must hold the bike. It would be almost assured that the bike would tip away from the holder, ensuring the top rider would fall before getting started. If the top rider got in the top seat, the lower rider would then need to roll the bike and get in while the bike was rolling (without upsetting the bike) - a hopeless task. Making the lower rider power and/or balance the thing while the top rider climbs and mounts would be similarly tricky. The only conclusion I could make is that it would be impossible to get it safely started or stopped without bracing against a tall ladder.