How can I find an adult-sized passenger trailer? Are bicyle passenger trailers limited to child sizes? I have looked for larger sizes but most stores only offer trailers sized for children. It would be an inline trailer sized for a small to medium size female, 160 pounds (72kg) or less.
Equinox makes a larger version of a child carrier for passengers up to 200 lbs.  See: http://www.equinoxtrailers.com/store/item/19