Step 2: Making a flat-bed trailer
- You can get a commercial bike cargo trailer for this project, or you can make one using one of the many Instructables. I bought a basic bike cargo trailer from Sears.com, the "M-wave trailer" for $200.
- Most commercial bike cargo trailers like the one I got have a fabric or plastic bed which isn't strong enough for our purpose, but can be replaced with a wood bed.
- Several of the "how to make a trailer" instructables are easy to put a wood bed onto if you choose to go that route.
- If I was doing this project over again I'd probably start with the Wandertec Bongo trailer which looks perfect for this project without any modifications. It's the only commercial trailer i could find with a flat wood bed.
Working with the M-Wave trailer (see photos below):
- Remove the side-rails
- Check the fit of your speakers on the trailer bed.
- Unscrew the plastic bed sheet from the trailer frame
- Use the plastic bed-sheet as a template for a new wood bed. Just trace the outline and screw holes of the plastic sheet directly onto a piece of 1/2" plywood and cut out the plywood with a saw. I added about 4" extra wood at the rear of the tralier so my speakers would fit on.
- Paint the plywood so it will be waterproof
- Screw down the plywood to the trailer frame.