I'm well aware that my 12 lb Chihuahua mix can't pull 200 lbs of human plus a bike, but could she at least run ahead of me without being in danger, and pull as much as she can manage anyway? Of course I'd be doing most of the work LOL, bu I was just wondering if it's possible! Right now she runs alongside me on a leash and that works out pretty well. If it helps any it would be mostly urban biking, there aren't too many trails nearby. So it wouldn't be hardcore, just kind of casual... Once a week at the most, and not too far.