The idea of adding a trailer to an electric bike makes perfect sense epecially if you need an increase in battery capacity. The single wheel trailer potentially has less air drag. Fairing the bike and trailer together would reduce energy required by up to half. We have lighter materials available than the Japanese utility cart. Attach the hitch to the frame and tune up your bike's brakes. I built my Jamis Aragon to tow a two wheel, rear facing trailer attached to the seat tube. The switch from 16" spoked wheels to 20" nylon BMX wheels improved the ride and weight capacity.
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