This is a trailer suitable for the TRX4M Defender (or Bronco).

All parts are screwed together (using many 2mm screws). The Hitch is printed in TPU (expects a 5mm hole to be plugged in).

Additional parts required:

• 15x 2mm screws
• 2x SCX24 or TRX4 wheels (or similar with same hexnut size)
• 4x 6mm ball or steel bearings
• 2x 30mm M3 screw + 2 nuts

I used the TRX4M standard wheels since I replaced those. Same for the steal bearings since I switch to ball bearings on the defender I had 4 spare to use for the trailer.

Edit: Added matching hitch for the TRX4M (remixed from https://www.thingiverse.com/thing:5738746 and shortened to give better climbing clearance)