It has a mtb drive train, but it has a pair of trac cogs on the other side of the hub driving the rear axle, So, actually whatever gear i am in it cuts the ratio in half. AVG speed for a working night shift 6-15 mph.
Yeah there are some hills, yes they can suck. The weight limit must be well over 1000 lbs, the most i ever took was seven people(5 inside 2 on bumper) This is not recommended though. Picture pedicab traveling in a wheelie. It can hold 2-3 adults safetly,