So my dad and I built a chopper a few years ago out of some old ten speeds, well I've grown up from a 110 pound 12 year old to a 180 pound 18 year old. I still love my bike to death, but putting all my weight over the single back tire isn't working. So I have decided to turn my rat bike into a 3 wheeler, but I have no clue how to build a rear axle for it? Any help or suggestions would be appreciated.