Recently John bought several surplus government containers for next to nothing. One was a container to carry Stinger missles. The inner dimensions are 43" x 37" x 16"...weatherproof...lockable...has nice latches. It occurred to him this might make a nice motorcycle trailer.
We took off his cargo carrier type trailer and set the Stinger container in place. It fit perfectly between the fenderwells! Four bolts and it was mounted.
The box opens completely for easy packing and all the space is usable.
15 cubic feet of low-profile space.