Need more hauling capacity on your bicycle? Primitive Engineering shows you how to make your own “sport utility bike” – “I first started this by bending bits of metal hangars to see what kind of tube bends I’ll need. Then I asked myself – how can I make this easier. Lucky for me, my other bikes were sitting nearby. The goal for this build is to extend the wheelbase of of my road bike and create a space to haul cargo, people and whatever else without the use of a trailer. Last year, I won an auction on a mountain bike for $3. It was missing a wheel and seat and its rear wheel bearing was shot. I improvised for awhile with it, but it was not a very enjoyable bike. “ Thanks Trebuchet03! – Link.