If your bike uses a standard 12mm x 148mm axle with SRAM's Universal Derailleur Hanger(UDH), and you would like to mate a Burley Coho XC trailer to it, then this is currently the only option to making it work.
You'll need to purchase Burley's 5mm Skewer Axle. Select option “170MM HUB SPACING”.
Then print these bushing in TPU. You'll only need one of each.
Flip models over in slicer so the flat side is touching the bed, and the convex side is facing up.
0.15 layer height
100% infill
Supports will be needed on the Keyed Bushing.
The author hasn't provided the model origin yet.