Most Bike Trailers go on a Traveling Bike and although many (travel-) bikes still use the Quick Release axle there are more and more bikes that come with the stronger and stiffer X12 or Thru-Axle.
To connect a Bike Trailer on an X12 Thru Axle we now offer the Thru Axle from Robert Axle project in our assorment. Your current axle is replaced by a new axle that has a protruding end to connect your hitch on.
With an X12 axle adapter you can easily attach a bicycle trailer to an X12 axle
Robert Axle offers different versions of axles depending your current axle. Robert Axle has the "What Axle Do I Need" page that actually let's you select your bike brand and type. For trailer choose "Kid Trailer" as that gives the options for any "hitch style trailer" like the Cyclone that connects to one side of the bike axle.