I took a look and yes they do sit lower. I don't know trikes are dangerous for sure. I did like the two wheel in front model. That is kind of interesting. Might make for a good DIY design...

Weld two axles to a pipe with the sooth parts outside the pipe Then weld it to the front fork of a bike. Put your wheels on with nuts and stuff to hold them in place but allow them to freewheel at the same time. Use twenty inch front wheels.

God i wish i could weld. Then you could put a standard china girl motor on it since the rear wheel would be the drive wheel.

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