Optibike M7 or R8

Well. It's specked at 200-250w, but it's nominal out-put is at 750w which is the max for the States and being street legal. I like power too, but I'm worried about the bike doing most of the work for me, whereas I want to 75% of the work, with help on the hills.
They call that ECO mode....:)
 
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