I put together a cargo trailer from scrap metal and trashed kid’s bikes. A bed frame provided the basic structure, to which I welded dropouts hacked from the donor bikes and a curved towing arm. A quick release ball joint was used for the hitch.
Don’t trust your welding skills? Check out the Burley Nomad, built by professionals and now offered at a reduced price (contact us for details)! Also check out Tom’s blog for the full story on this unique build.