Ok, I've checked out Tom's Cargo Bikes page and have looked at Bilenkys, Madsens and Bullitts, but as I was trying to sketch out how I was going to build a cargo bike with a fabricatin' friend, I asked him, 'why not build the platform towards the back?' Put the 20" wheel at the back a la Madsen and use a single or dual front sprocket to keep the chain lower, and fabricate the platform above the chainline. Possibly use an internal geared hub and a small single sprocket to lower the chain.
I am just thinking out loud, so I'm curious as to what the collective fabricating brain says to this?
There must be some sort of obvious reason why not, I'm just blueskying here. Has someone ever even tried to construct a sled in this configuration?
Sun Valley, NV